docs: Add Docker to README (ipfs#1240)

Author: victorb

README.md

@@ -67,6 +67,7 @@ You can check the development status at the [Waffle Board](https://waffle.io/ipf
     - [Node Management](#node-management)
     - [Domain data types](#domain-data-types)
 - [FAQ](#faq)
+- [Running js-ipfs with Docker](#running-js-ipfs-with-docker)
 - [Packages](#packages)
 - [Development](#development)
   - [Clone and install dependencies](#clone-and-install-dependencies)
@@ -501,6 +502,38 @@ HOME=~/.electron-gyp npm install
 
 If you find any other issue, please check the [`Electron Support` issue](https://github.com/ipfs/js-ipfs/issues/843).
 
+## Running js-ipfs with Docker
+
+We have automatic Docker builds setup with Docker Hub: https://hub.docker.com/r/ipfs/js-ipfs/
+
+All branches in the Github repository maps to a tag in Docker Hub, except `master` Git branch which is mapped to `latest` Docker tag.
+
+You can run js-ipfs like this:
+
+```
+$ docker run -it -p 4002:4002 -p 4003:4003 -p 5002:5002 -p 9090:9090 ipfs/js-ipfs:latest
+
+initializing ipfs node at /root/.jsipfs
+generating 2048-bit RSA keypair...done
+peer identity: Qmbd5jx8YF1QLhvwfLbCTWXGyZLyEJHrPbtbpRESvYs4FS
+to get started, enter:
+
+         jsipfs files cat /ipfs/QmfGBRT6BbWJd7yUc2uYdaUZJBbnEFvTqehPFoSMQ6wgdr/readme
+
+Initializing daemon...
+Using wrtc for webrtc support
+Swarm listening on /ip4/127.0.0.1/tcp/4003/ws/ipfs/Qmbd5jx8YF1QLhvwfLbCTWXGyZLyEJHrPbtbpRESvYs4FS
+Swarm listening on /ip4/172.17.0.2/tcp/4003/ws/ipfs/Qmbd5jx8YF1QLhvwfLbCTWXGyZLyEJHrPbtbpRESvYs4FS
+Swarm listening on /ip4/127.0.0.1/tcp/4002/ipfs/Qmbd5jx8YF1QLhvwfLbCTWXGyZLyEJHrPbtbpRESvYs4FS
+Swarm listening on /ip4/172.17.0.2/tcp/4002/ipfs/Qmbd5jx8YF1QLhvwfLbCTWXGyZLyEJHrPbtbpRESvYs4FS
+API is listening on: /ip4/0.0.0.0/tcp/5002
+Gateway (readonly) is listening on: /ip4/0.0.0.0/tcp/9090
+Daemon is ready
+
+$ curl --silent localhost:5002/api/v0/id | jq .ID
+"Qmbd5jx8YF1QLhvwfLbCTWXGyZLyEJHrPbtbpRESvYs4FS"
+```
+
 ## Packages
 
 | Package | Version | Deps | DevDeps | Travis | Circle | AppVeyor | Coverage |