diff --git a/README.md b/README.md
index be80c1e..d8dfa42 100644
--- a/README.md
+++ b/README.md
@@ -31,7 +31,7 @@ Sharelatex/Overleaf uses the email address to identify users: If you change the
 in the mongo db.
 
 ```
-docker exec -it mongo
+docker exec -it mongo /bin/bash
 mongo 
 use sharelatex
 db.users.find({email:"EMAIL"}).pretty()
@@ -56,7 +56,8 @@ MYDATA=/data
 - sharelatex: all projects, tmp files, user files templates and ...
 - letsencrypt: https certificates
 
-*MYDOMAIN* is the FQDN for sharelatex and certbot (letsencrypt) <br/>
+*MYDOMAIN* is the FQDN for sharelatex and traefik (letsencrypt) <br/>
+*MYDOMAIN*:8443 Traefik Dashboard - Login uses traefik/user.htpasswd : user:admin pass:adminPass change this (e.g. generate a password with htpasswd)
 *MYMAIL* is the admin mailaddress
 
 ```
@@ -125,21 +126,15 @@ make
 ```
 to generate the ldap-overleaf-sl docker image.
 
-Then start docker containers:
+Then start docker containers (with loadbalancer):
 ``` 
-docker-compose up -d
+export NUMINSTANCES=1
+docker-compose up -d --scale sharelaatex=NUMINSTANCES
 ```
 
 *Known Issue:*
-During the first startup the certbot image will get an initial certificate - if that 
-happens not in a very timely manner sharelatex will fail to start (due to the missing certificates 
-nginx crashes). Solution: wait 10 seconds and restart the sharelatex container.
+- Works up to sharelatex 2.3.1. After that at least issue #5 is introduced.
+
 
-```
-docker stop ldap-overleaf-sl 
-docker-compose up -d
-```
 
-After the inital startup and certificate configuration you can reconfigure the 
-docker-compose.yml that port 80 points to the Sharelatex/Overleaf instance.
 
diff --git a/docker-compose.yml b/docker-compose.yml
index 8a86d91..507867e 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -1,27 +1,108 @@
 version: '2.2'
 services:
+    traefik:
+        image: traefik:latest
+        container_name: traefik
+        restart: unless-stopped
+        security_opt:
+          - no-new-privileges:true
+        networks:
+          - web
+        ports:
+          - 80:80
+          - 443:443
+          - 8443:8443
+          # - 8080:8080
+          # - 27017:27017
+        volumes:
+          - ${MYDATA}/letsencrypt:/letsencrypt
+          - /etc/localtime:/etc/localtime:ro
+          - /var/run/docker.sock:/var/run/docker.sock:ro
+          - ./traefik/dynamic_conf.yml:/dynamic_conf.yml
+          - ./traefik/users.htpasswd:/users.htpasswd
+
+        command:
+          - "--api=true"
+          - "--api.dashboard=true"
+          #- "--api.insecure=true" # provides the dashboard on http://IPADRESS:8080
+          - "--providers.docker=true"
+          - "--ping"
+          - "--providers.docker.network=web"
+          - "--providers.docker.exposedbydefault=false"
+          - "--entrypoints.web.address=:80"
+          - "--entrypoints.web-secure.address=:443"
+          - "--entrypoints.web-admin.address=:8443"
+          - "--certificatesresolvers.myhttpchallenge.acme.httpchallenge=true"
+          - "--certificatesresolvers.myhttpchallenge.acme.httpchallenge.entrypoint=web"
+          - "--certificatesresolvers.myhttpchallenge.acme.email=${MYMAIL}"
+          - "--certificatesresolvers.myhttpchallenge.acme.storage=/letsencrypt/acme.json"
+          - "--entrypoints.mongo.address=:27017"
+          #- --certificatesresolvers.myhttpchallenge.acme.caserver=https://acme-v02.api.letsencrypt.org/directory
+        labels:
+          - "traefik.enable=true"
+          # To Fix enable dashboard on port 8443
+          - "traefik.http.routers.dashboard.entrypoints=web-admin"
+          - "traefik.http.routers.dashboard.rule=Host(`${MYDOMAIN}`)" 
+          # - "traefik.http.routers.dashboard.rule=Host(`traefik.${MYDOMAIN}`) && (PathPrefix(`/api`) || PathPrefix(`/dashboard`))"
+          - "traefik.http.routers.dashboard.tls=true"
+          - "traefik.http.routers.dashboard.middlewares=auth"
+          - "traefik.http.middlewares.auth.basicauth.usersfile=/users.htpasswd"
+          - "traefik.http.routers.dashboard.service=api@internal"
+
+        logging:
+          driver: "json-file"
+          options:
+            max-size: "10m"
+            max-file: "1"
+
     sharelatex:
         restart: always
         image: ldap-overleaf-sl:latest
-        container_name: ldap-overleaf-sl
         depends_on:
             mongo:
                 condition: service_healthy
             redis:
                 condition: service_healthy
-            simple-certbot:
+            traefik: 
                 condition: service_started
+            #simple-certbot:
+            #    condition: service_started
         privileged: false
-        ports:
-            - 443:443
+        networks:
+            - web
+        expose:
+            - 80
+            - 443
         links:
             - mongo
             - redis
-            - simple-certbot
+              #- simple-certbot
         volumes:
             - ${MYDATA}/sharelatex:/var/lib/sharelatex
-            - ${MYDATA}/letsencrypt:/etc/letsencrypt
-            - ${MYDATA}/letsencrypt/live/${MYDOMAIN}/:/etc/letsencrypt/certs/domain
+            - ${MYDATA}/letsencrypt:/etc/letsencrypt:ro
+            # - ${MYDATA}/letsencrypt/live/${MYDOMAIN}/:/etc/letsencrypt/certs/domain
+        labels:
+              - "traefik.enable=true"
+              - "traefik.http.routers.tex.entrypoints=web"
+              - "traefik.http.middlewares.redirect-to-https.redirectscheme.scheme=https"
+              - "traefik.http.routers.sharel.middlewares=redirect-to-https@docker"
+              - "traefik.http.routers.sharel-secured.rule=Host(`${MYDOMAIN}`)"
+              - "traefik.http.routers.sharel-secured.tls=true"
+              - "traefik.http.routers.sharel-secured.tls.certresolver=myhttpchallenge"
+              - "traefik.http.routers.sharel-secured.entrypoints=web-secure"
+              - "traefik.http.routers.proxy-https.entrypoints=web-secure"
+              - "traefik.http.routers.proxy-https.rule=Host(`${MYDOMAIN}`)" 
+              - "traefik.http.services.sharel.loadbalancer.server.port=80"
+              - "traefik.http.services.sharel.loadbalancer.server.scheme=http"
+              # ToDo - internally connect via https: reuse the certifiacte from traefik (acme.json)
+              #- "traefik.http.services.sharel.loadbalancer.server.port=443"
+              #- "traefik.http.services.sharel.loadbalancer.server.scheme=https"
+              - "traefik.http.services.sharel.loadbalancer.sticky.cookie=true"
+              - "traefik.http.services.sharel.loadbalancer.sticky.cookie.name=io"
+              - "traefik.http.services.sharel.loadbalancer.sticky.cookie.httponly=true"
+              - "traefik.http.services.sharel.loadbalancer.sticky.cookie.secure=true"
+              - "traefik.http.services.sharel.loadbalancer.sticky.cookie.samesite=io"
+
         environment:
             SHARELATEX_APP_NAME: Overleaf
             SHARELATEX_MONGO_URL: mongodb://mongo/sharelatex
@@ -32,8 +113,6 @@ services:
             SHARELATEX_LEFT_FOOTER: '[{"text": "Powered by <a href=\"https://www.sharelatex.com\">ShareLaTeX</a> 2016"} ]'
             SHARELATEX_RIGHT_FOOTER: '[{"text": "LDAP Overleaf (beta)"} ]'
             SHARELATEX_EMAIL_FROM_ADDRESS: "noreply@${MYDOMAIN}"
-            # SHARELATEX_EMAIL_AWS_SES_ACCESS_KEY_ID: 
-            # SHARELATEX_EMAIL_AWS_SES_SECRET_KEY: 
             SHARELATEX_EMAIL_SMTP_HOST: smtp.${MYDOMAIN}
             SHARELATEX_EMAIL_SMTP_PORT: 587
             SHARELATEX_EMAIL_SMTP_SECURE: 'false'
@@ -43,18 +122,31 @@ services:
             # SHARELATEX_EMAIL_SMTP_IGNORE_TLS: false
             SHARELATEX_CUSTOM_EMAIL_FOOTER: "This system is run by ${MYDOMAIN} - please contact ${MYMAIL} if you experience any issues." 
 
+            # make public links accessible w/o login (link sharing issue)
+            # https://github.com/overleaf/docker-image/issues/66
+            # https://github.com/overleaf/overleaf/issues/628
+            # https://github.com/overleaf/web/issues/367
+            # Fixed in 2.0.2 (Release date: 2019-11-26)
+            SHARELATEX_ALLOW_PUBLIC_ACCESS: 'true' 
+            SHARELATEX_ALLOW_ANONYMOUS_READ_AND_WRITE_SHARING: 'true'
+
+            SHARELATEX_SECURE_COOKIE: 'true'
+            SHARELATEX_BEHIND_PROXY: 'true'
+            
             LDAP_SERVER: ldaps://LDAPSERVER:636
             LDAP_BASE: ou=people,dc=DOMAIN,dc=TLD
             LDAP_BINDDN: ou=someunit,ou=people,dc=DOMAIN,dc=TLS
+            
             # By default tries to bind directly with the ldap user - this user has to be in the LDAP GROUP
+            # LDAP_GROUP_FILTER: '(memberof=cn=GROUPNAME,ou=groups,dc=DOMAIN,dc=TLD)'
             LDAP_GROUP_FILTER: '(memberof=cn=GROUPNAME,ou=groups,dc=DOMAIN,dc=TLD)'
 
             # If user is in ADMIN_GROUP on user creation (first login) isAdmin is set to true. 
             # Admin Users can invite external (non ldap) users. This feature makes only sense 
             # when ALLOW_EMAIL_LOGIN is set to 'true'. Additionally admins can send 
             # system wide messages.
-            #LDAP_ADMIN_GROUP_FILTER: '(memberof=cn=ADMINGROUPNAME,ou=groups,dc=DOMAIN,dc=TLD)'
-            ALLOW_EMAIL_LOGIN: 'false'
+            LDAP_ADMIN_GROUP_FILTER: '(memberof=cn=ADMINGROUPNAME,ou=groups,dc=DOMAIN,dc=TLD)'
+            ALLOW_EMAIL_LOGIN: 'true'
 
             # All users in the LDAP_GROUP_FILTER are loaded from the ldap server into contacts.
             # This LDAP search happens without bind. If you want this and your LDAP needs a bind you can 
@@ -76,7 +168,7 @@ services:
         restart: always
         image: mongo
         container_name: mongo
-        ports:
+        expose:
             - 27017
         volumes:
             - ${MYDATA}/mongo_data:/data/db
@@ -85,6 +177,14 @@ services:
             interval: 10s
             timeout: 10s
             retries: 5
+        labels:
+            - "traefik.enable=true"
+            - "traefik.tcp.routers.mongodb.rule=HostSNI(`*`)"
+            - "traefik.tcp.services.mongodb.loadbalancer.server.port=27017"
+            - "traefik.tcp.routers.mongodb.tls=true"
+            - "traefik.tcp.routers.mongodb.entrypoints=mongo" 
+        networks:
+            - web
 
     redis:
         restart: always
@@ -98,7 +198,7 @@ services:
         sysctls:
             - net.core.somaxconn=65535
             # - vm.overcommit_memory=1
-        ports:
+        expose:
             - 6379
         volumes:
             - ${MYDATA}/redis_data:/data
@@ -107,23 +207,30 @@ services:
             interval: 10s
             timeout: 5s
             retries: 5
+        networks:
+            - web
 
 
-    simple-certbot:
-        restart: always
-        image: certbot/certbot
-        container_name: simple-certbot
-        ports:
-            - 80:80
-        volumes:
-            - ${MYDATA}/letsencrypt:/etc/letsencrypt
-        # a bit hacky but this docker image uses very little disk-space
-        # best practices for ssl and nginx are set in the ldap-overleaf-sl Dockerfile
-        entrypoint: 
-            - "/bin/sh"
-            - -c
-            - | 
-              trap exit TERM;\
-              certbot certonly --standalone -d ${MYDOMAIN} --agree-tos -m ${MYMAIL} -n ; \
-              while :; do certbot renew; sleep 240h & wait $${!}; done;
+#    simple-certbot:
+#        restart: always
+#        image: certbot/certbot
+#        container_name: simple-certbot
+#        ports:
+#            - 80:80
+#        volumes:
+#            - ${MYDATA}/letsencrypt:/etc/letsencrypt
+#        # a bit hacky but this docker image uses very little disk-space
+#        # best practices for ssl and nginx are set in the ldap-overleaf-sl Dockerfile
+#        entrypoint: 
+#            - "/bin/sh"
+#            - -c
+#            - | 
+#              trap exit TERM;\
+#              certbot certonly --standalone -d ${MYDOMAIN} --agree-tos -m ${MYMAIL} -n ; \
+#              while :; do certbot renew; sleep 240h & wait $${!}; done;
+#
+
+networks:
+  web:
+    external: true
 
diff --git a/ldap-overleaf-sl/Dockerfile b/ldap-overleaf-sl/Dockerfile
index 79971a4..a6c958c 100644
--- a/ldap-overleaf-sl/Dockerfile
+++ b/ldap-overleaf-sl/Dockerfile
@@ -1,4 +1,4 @@
-FROM sharelatex/sharelatex:latest
+FROM sharelatex/sharelatex:2.3.1
 LABEL maintainer="Simon Haller-Seeber"
 LABEL version="0.1"
 
@@ -7,14 +7,15 @@ ARG collab_text
 ARG login_text
 
 # set workdir (might solve issue #2 - see https://stackoverflow.com/questions/57534295/)
-WORKDIR /var/www/sharelatex
+WORKDIR /var/www/sharelatex/web
 
 # install latest npm
 RUN npm install -g npm
 # clean cache (might solve issue #2)
-RUN npm cache clean --force
+#RUN npm cache clean --force
 RUN npm install ldapts-search
 RUN npm install ldapts
+#RUN npm install bcrypt@5.0.0
 
 # This variant of updateing texlive does not work
 #RUN  bash -c tlmgr install scheme-full
@@ -48,7 +49,7 @@ COPY sharelatex/admin-index.pug 	/var/www/sharelatex/web/app/views/admin/index.p
 RUN rm /var/www/sharelatex/web/app/views/admin/register.pug
 
 ### To remove comments entirly (bug https://github.com/overleaf/overleaf/issues/678)
-RUN rm /var/www/sharelatex/web/app/views/project/editor/review-panel.pug
+#RUN rm /var/www/sharelatex/web/app/views/project/editor/review-panel.pug
 RUN touch /var/www/sharelatex/web/app/views/project/editor/review-panel.pug
 
 ### Nginx and Certificates
@@ -63,3 +64,10 @@ RUN wget https://raw.githubusercontent.com/certbot/certbot/master/certbot/certbo
 # reload nginx via cron for reneweing https certificates automatically
 COPY nginx/nginx-reload.sh  /etc/cron.weekly/
 RUN chmod 0744 /etc/cron.weekly/nginx-reload.sh
+
+## extract certificates from acme.json?
+# COPY nginx/nginx-cert.sh  /etc/cron.weekly/
+# RUN chmod 0744 /etc/cron.weekly/nginx-cert.sh
+# RUN echo "/usr/cron.weekly/nginx-cert.sh 2>&1 > /dev/null" >  /etc/rc.local
+# RUN chmod 0744 /etc/rc.local
+
diff --git a/ldap-overleaf-sl/nginx/nginx-cert.sh b/ldap-overleaf-sl/nginx/nginx-cert.sh
new file mode 100644
index 0000000..d185c59
--- /dev/null
+++ b/ldap-overleaf-sl/nginx/nginx-cert.sh
@@ -0,0 +1,3 @@
+#!/bin/bash
+less /etc/letsencrypt/acme.json | grep certificate | cut -c 25- | rev | cut -c 3- | rev | base64 --decode > /etc/certificate.crt
+less /etc/letsencrypt/acme.json | grep key | cut -c 17- | rev | cut -c 3- | rev | base64 --decode > /etc/key.crt
diff --git a/ldap-overleaf-sl/nginx/sharelatex.conf b/ldap-overleaf-sl/nginx/sharelatex.conf
index f6f5bb5..663a0ec 100644
--- a/ldap-overleaf-sl/nginx/sharelatex.conf
+++ b/ldap-overleaf-sl/nginx/sharelatex.conf
@@ -1,31 +1,31 @@
 server {
 	listen         80;
 	server_name    _; # Catch all, see http://nginx.org/en/docs/http/server_names.html
-        location /.well-known/acme-challenge/ {
-	    root /var/www/certbot;
-	}
-        location / {
-          return 301 https://$host$request_uri;
-        }    
-}
+#        location / {
+#          return 301 https://$host$request_uri;
+#        }    
+#}
+#
+#
+#server {
+#        
+#	listen 443 ssl default_server;
+#        listen [::]:443 ssl default_server;
+#        server_name    _; # Catch all
 
-
-server {
-        
-	listen 443 ssl default_server;
-        listen [::]:443 ssl default_server;
-        server_name    _; # Catch all
+        add_header Strict-Transport-Security "max-age=31536000; includeSubdomains;";
+        server_tokens off;
+        add_header X-Frame-Options SAMEORIGIN;
+        add_header X-Content-Type-Options nosniff;
 
 	set $static_path /var/www/sharelatex/web/public;
-        ssl_certificate /etc/letsencrypt/certs/domain/fullchain.pem;
-        ssl_certificate_key /etc/letsencrypt/certs/domain/privkey.pem;
- 	include /etc/nginx/options-ssl-nginx.conf;
-        ssl_dhparam /etc/nginx/ssl-dhparams.pem;
-
-        location /.well-known/acme-challenge/ {
-	    root /var/www/certbot;
-	}
-
+#        ssl_certificate /etc/certificate.crt;
+#        ssl_certificate_key /etc/key.crt;
+#        ssl_certificate /etc/letsencrypt/certs/domain/fullchain.pem;
+#        ssl_certificate_key /etc/letsencrypt/certs/domain/privkey.pem;
+# 	include /etc/nginx/options-ssl-nginx.conf;
+#        ssl_dhparam /etc/nginx/ssl-dhparams.pem;
+#
 	location / {
 		proxy_pass http://127.0.0.1:3000;
 		proxy_http_version 1.1;
diff --git a/ldap-overleaf-sl/sharelatex/AuthenticationManager.js b/ldap-overleaf-sl/sharelatex/AuthenticationManager.js
index e5213e9..6a38ba9 100644
--- a/ldap-overleaf-sl/sharelatex/AuthenticationManager.js
+++ b/ldap-overleaf-sl/sharelatex/AuthenticationManager.js
@@ -57,6 +57,8 @@ const AuthenticationManager = {
       //console.log("Creating User:" + JSON.stringify(query))
       //create random pass for local userdb, does not get checked for ldap users during login
       let pass = require("crypto").randomBytes(32).toString("hex")
+      console.log("Creating User:" + JSON.stringify(query) + "Random Pass" + pass)
+
       const userRegHand = require('../User/UserRegistrationHandler.js')
       userRegHand.registerNewUser({
         email: mail,
@@ -179,7 +181,7 @@ const AuthenticationManager = {
 
     checkRounds(user, hashedPassword, password, callback) {
         // Temporarily disable this function, TODO: re-enable this
-        //callback()
+        return callback()
         if (Settings.security.disableBcryptRoundsUpgrades) {
             return callback()
         }
@@ -212,7 +214,7 @@ const AuthenticationManager = {
             }
             db.users.update(
                 {
-                    _id: ObjectId(userId._id.toString())
+                    _id: ObjectId(userId.toString())
                 },
                 {
                     $set: {
diff --git a/traefik/dynamic_conf.yml b/traefik/dynamic_conf.yml
new file mode 100644
index 0000000..5e46645
--- /dev/null
+++ b/traefik/dynamic_conf.yml
@@ -0,0 +1,33 @@
+tls:
+  options:
+    default:
+      minVersion: VersionTLS12
+      cipherSuites:
+        - TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
+        - TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
+        - TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305
+        - TLS_AES_128_GCM_SHA256
+        - TLS_AES_256_GCM_SHA384
+        - TLS_CHACHA20_POLY1305_SHA256
+      curvePreferences:
+        - CurveP521
+        - CurveP384
+      sniStrict: true
+
+http:
+  middlewares:
+    secHeaders:
+      headers:
+        browserXssFilter: true
+        contentTypeNosniff: true
+        frameDeny: true
+        sslRedirect: true
+        #HSTS Configuration
+        stsIncludeSubdomains: true
+        stsPreload: true
+        stsSeconds: 31536000
+        customFrameOptionsValue: "SAMEORIGIN"
+
+    https-redirect:
+      redirectScheme:
+        scheme: https
diff --git a/traefik/users.htpasswd b/traefik/users.htpasswd
new file mode 100644
index 0000000..3dd4180
--- /dev/null
+++ b/traefik/users.htpasswd
@@ -0,0 +1 @@
+admin:$apr1$7xGHLKlO$Mx2DNcWfqiHfH1WLg51ul.