docs: Update content

README.md

@@ -1,15 +1,7 @@
 # Etherpad Lite image for docker
 
-
-This is a docker image for [Etherpad Lite](http://etherpad.org/) collaborative
-text editor. The Dockerfile for this image has been inspired by the
-[official Wordpress](https://registry.hub.docker.com/_/wordpress/) Dockerfile and
-[johbo's etherpad-lite](https://registry.hub.docker.com/u/johbo/etherpad-lite/)
-image.
-
 This image uses an mysql container for the backend for the pads. It is based
-on debian jessie instead of the official node docker image, since the latest
-stable version of etherpad-lite does not support npm 2.
+on latest nodejs image.
 
 ## About Etherpad Lite
 
@@ -17,7 +9,7 @@ stable version of etherpad-lite does not support npm 2.
 
 Etherpad allows you to edit documents collaboratively in real-time, much like a live multi-player editor that runs in your browser. Write articles, press releases, to-do lists, etc. together with your friends, fellow students or colleagues, all working on the same document at the same time.
 
-![alt text](http://i.imgur.com/zYrGkg3.gif "Etherpad in action on PrimaryPad")
+![alt text](http://i.imgur.com/zYrGkg3.gif "Etherpad in action")
 
 All instances provide access to all data through a well-documented API and supports import/export to many major data exchange formats. And if the built-in feature set isn't enough for you, there's tons of plugins that allow you to customize your instance to suit your needs.
 
@@ -25,26 +17,44 @@ You don't need to set up a server and install Etherpad in order to use it. Just
 
 ## Quickstart
 
-First you need a running mysql container, for example:
+Copy-paste the following content in a `docker-compose.yml` file
 
-```bash
-$ docker network create ep_network
-$ docker run -d --network ep_network -e MYSQL_ROOT_PASSWORD=password --name ep_mysql mysql
+```yaml
+---
+version: "3.4"
+
+services:
+  db:
+    image: mariadb:10.3
+    command: --character-set-server=utf8mb4 --collation-server=utf8mb4_unicode_ci
+    volumes:
+      - db_data:/var/lib/mysql
+    environment:
+      MARIADB_ROOT_PASSWORD: insecure
+      MARIADB_DATABASE: etherpad
+
+  etherpad:
+    build:
+      context: .
+      dockerfile: Dockerfile
+    image: glenux/etherpad:latest
+    environment:
+      DATABASE_URL: mysql://root:insecure:3306@db/etherpad
+      ETHERPAD_ADMIN_USER: admin
+      ETHERPAD_ADMIN_PASSWORD: insecure
+      NODE_ENV: production
+    ports:
+      - 9001:9001
+
+volumes:
+  db_data:
 ```
 
-Finally you can start an instance of Etherpad Lite:
-
-```bash
-$ docker run -d \
-    --network ep_network \
-    -e ETHERPAD_DB_HOST=ep_mysql \
-    -e ETHERPAD_DB_PASSWORD=password \
-    -p 9001:9001 \
-    tvelocity/etherpad-lite
-```
+Then run `docker-compose up`
 
 Etherpad will automatically create an `etherpad` database in the specified mysql
 server if it does not already exist.
+
 You can now access Etherpad Lite from http://localhost:9001/
 
 ## Environment variables
@@ -53,9 +63,6 @@ This image supports the following environment variables:
 
 * `ETHERPAD_TITLE`: Title of the Etherpad Lite instance. Defaults to "Etherpad".
 * `ETHERPAD_PORT`: Port of the Etherpad Lite instance. Defaults to 9001.
-* `ETHERPAD_SESSION_KEY`: Session key for the Etherpad Lite configuraition. You
-can set this in case of migrating from another installation. A value is
-automatically generated by default.
 
 * `ETHERPAD_ADMIN_PASSWORD`: If set, an admin account is enabled for Etherpad,
 and the /admin/ interface is accessible via it.
@@ -65,7 +72,7 @@ Otherwise the user can set it to another username.
 * `ETHERPAD_DB_HOST`: Hostname of the mysql databse to use. Defaults to `mysql`
 * `ETHERPAD_DB_USER`: By default Etherpad Lite will attempt to connect as root
 to the mysql container.
-* `ETHERPAD_DB_PASSWORD`: MySQL password to use, mandatory. If legacy links
+* `ETHERPAD_DB_PASS`: MySQL password to use, mandatory. If legacy links
 are used and ETHERPAD_DB_USER is root, then `MYSQL_ENV_MYSQL_ROOT_PASSWORD` is
 automatically used.
 * `ETHERPAD_DB_NAME`: The mysql database to use. Defaults to *etherpad*. If the
@@ -73,3 +80,4 @@ database is not available, it will be created when the container is launched.
 
 The generated settings.json file will be available as a volume under
 */opt/etherpad-lite/var/*.
+