Updated Install Wekan Docker in production (markdown)

Install-Wekan-Docker-in-production.md

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+**Purpose:** run Wekan on a production Linux server with Docker and Apache as a front-end (reverse proxy)
+
+## 1. Install Docker and Docker-compose
+
+[Install Docker](http://docs.docker.com/linux/step_one/) and [install Docker-Compose](http://docs.docker.com/compose/install/).
+
+## 2. Configure Wekan
+
+* Let say we create a dedicated user for Wekan : `sudo useradd -d /home/wekan -m -s /bin/bash wekan`.
+* Add this user to the docker group: `sudo usermod -aG docker wekan`
+* Create the file `/home/wekan/docker-compose.yml` containing: 
+
+
+```yaml
+wekan:
+  image: mquandalle/wekan
+  links:
+    - wekandb
+  environment:
+    - MONGO_URL=mongodb://wekandb/wekan
+    - ROOT_URL=http://localhost:8081
+
+wekandb:
+   image: mongo
+   volumes:
+     - /home/wekan/data:/data/db
+```
+
+## 3. Configure Apache as a front-end proxy
+
+* Enable Mod_Proxy: `sudo a2enmod proxy proxy_http` then restart Apache `service apache2 restart`
+* Configure your virtual host (vhost)
+
+Let say you have the following "mytodo.org" vhost configured in `/etc/apache2/sites-available/mytodo.org.conf`:
+
+```ApacheConf
+<VirtualHost *:80>
+        ServerName mytodo.org
+        ServerAdmin webmaster@mytodo.org
+
+        DocumentRoot /var/www-vhosts/mytodo.org
+        <Directory />
+                Options FollowSymLinks
+                AllowOverride AuthConfig FileInfo Indexes Options=MultiViews
+        </Directory>
+
+        <Directory /var/www-vhosts/mytodo.org>
+                Options -Indexes +FollowSymLinks +MultiViews
+                AllowOverride AuthConfig FileInfo Indexes Options=MultiViews
+                Require all granted
+        </Directory>
+
+        ErrorLog /var/log/apache2/mytodo.org-error.log
+
+        # Possible values include: debug, info, notice, warn, error, crit,
+        # alert, emerg.
+        LogLevel warn
+
+        CustomLog /var/log/apache2/mytodo.org-access.log combined
+        ServerSignature Off
+</VirtualHost>
+```
+
+Add the following lines at the end just before `</VirtualHost>`:
+
+```ApacheConf
+        ProxyPass        "/" "http://127.0.0.1:8081"
+        ProxyPassReverse "/" "http://127.0.0.1:8081"
+```
+
+**Note:** if not already done, don't forget to enable your vhost `sudo a2ensite mytodo.org`
+
+Reload Apache `sudo service apache2 reload`
+
+[Apache Mod_Proxy documentation](http://httpd.apache.org/docs/current/mod/mod_proxy.html)
+
+## 4. Launch Wekan on boot