obfs4 documentation

[e9x]

I love this project! It's portable and I was able to get it running in minutes! The only issue I had was setting up an obfs4 bridge due to censorship here. I have some changes that installs lyrebird from the alpine testing repo and configures torrc. I think there should also be some documentation for rebuilding the container.

In gateway/Containerfile

FROM alpine:latest
-RUN apk add tor
+RUN apk add tor lyrebird --repository=http://dl-cdn.alpinelinux.org/alpine/edge/testing/

In gateway/torrc

DNSPort 10.2.2.254:5353
+
+UseBridges 1
+ClientTransportPlugin obfs4 exec /usr/bin/lyrebird managed
+bridge obfs4 <bridge stuff from https://bridges.torproject.org/bridges/?transport=obfs4>

[hardcore-sushi]

Thank you for the instructions. It would be great to add support for bridge, but it shouldn't replace the current no-bridge setup.

We should rather have 2 container configs: one without bridge (the current one), and one containing a template for bridges (in order to allow both obfs4 and webtunnel). Then we would let the user decide via CLI option if bridges must be used.