docs: Added readme info

.env.example

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+local=true
+admin_ip=127.0.0.1
+cookie=s%3A...

README.md

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-# faucet
+# Woodburn Faucet
+A simple faucet for Handshake domains
+
+Running on [faucet.woodburn.au](https://faucet.woodburn.au)
+
+## Docker deployment
+```
+docker run -d \
+  --name=faucet \
+  -e admin_ip=<your-IP> \
+  -e cookie=<your-nb-main-cookie>
+  -p 5000:5000 \
+  git.woodburn.au/nathanwoodburn/faucet:latest
+
+```