Updated docker usage

README.md

@@ -6,12 +6,15 @@ Docker image for running an Electrum server.
 ## Usage
 
 ```
-docker run \
-  -v /home/username/electrumx:/data \
-  -e DAEMON_URL=http://user:pass@host:port \
-  -e COIN=BitcoinSegwit \
-  -p 50002:50002 \
-  lukechilds/electrumx
+electrum:
+  image: git.prettyhefty.com/bill/electrumx-docker:1.16.0
+  restart: unless-stopped
+  container_name: electrum
+  environment:
+    - COIN=Bitcoin
+    - DAEMON_URL=username:password@bitcoin-core
+  volumes:
+    - ${DATA_DIR}/electrum:/db
 ```
 
 If there's an SSL certificate/key (`electrumx.crt`/`electrumx.key`) in the `/data` volume it'll be used. If not, one will be generated for you.