Update Docker docs, add badge to README

README.md

@@ -2,6 +2,7 @@
 
 [![Build status](https://circleci.com/gh/threema-ch/threema-web.svg?style=shield&circle-token=:circle-token)](https://circleci.com/gh/threema-ch/threema-web)
 [![License](https://img.shields.io/badge/License-AGPLv3-blue.svg)](https://github.com/threema-ch/threema-web/blob/master/LICENSE.txt)
+[![Docker Image](https://img.shields.io/badge/docker%20image-threema%2Fthreema--web-yellow.svg)](https://hub.docker.com/r/threema/threema-web)
 
 Threema Web is a web client for Threema, a privacy-focussed end-to-end
 encrypted mobile messenger hosted and developed in Switzerland. With Threema

docs/docker.md

@@ -1,14 +1,11 @@
 # Running Threema Web with Docker
 
+A Docker image with Threema Web is published on Docker Hub at
+[`threema/threema-web`](https://hub.docker.com/r/threema/threema-web).
 
-## Building the Image
+Alternatively you can build the image yourself:
 
-To build the Docker image:
-
-    $ docker build . -t example/threema-web:latest
-
-
-## Running the Image
+    $ docker build . -t threema/threema-web:v2.1
 
 To run the Docker image:
 
@@ -24,8 +21,7 @@ mechanisms in your web server.
 
 ## Config Variables
 
-| Variable | Default | Description |
-| -------- | ------- | ----------- |
-| `SALTYRTC_HOST` | null | The SaltyRTC signaling server hostname |
-| `SALTYRTC_PORT` | 443 | The SaltyRTC signaling server port |
-| `SALTYRTC_SERVER_KEY` | "b1337fc8402f7db8ea639e05ed05d65463e24809792f91eca29e88101b4a2171" | The SaltyRTC signaling server public key |
+- `SALTYRTC_HOST`: The SaltyRTC signaling server hostname (default `null`)
+- `SALTYRTC_PORT`: The SaltyRTC signaling server port (default `443`)
+- `SALTYRTC_SERVER_KEY`: The SaltyRTC signaling server public key
+  (default `"b1337fc8402f7db8ea639e05ed05d65463e24809792f91eca29e88101b4a2171"`)

docs/self_hosting.md

@@ -22,7 +22,7 @@ that is required to host it is a web server that can deliver static content via
 https. We recommend using Nginx. Additionally, to build the release version
 yourself, a recent version of npm is required.
 
-### Building
+### Building from source
 
 You can get the source code from Github: