Improve Docker support description

README.md

@@ -109,6 +109,13 @@ URL format. For example, an HTTP proxy at `1.2.3.4:3128` with a username of `joh
 supplied as `--proxy http://john.doe:secret@1.2.3.4:3128`. This works analogously to curl's `--proxy` argument.
 
 ## Docker Support
+Tun2proxy can serve as a proxy for other Docker containers. To make use of that feature, first build the image:
+
+```bash
+docker build -t tun2proxy .
+```
+
+Next, start a container from the tun2proxy image:
 
 ```bash
 docker run -d \
@@ -118,20 +125,18 @@ docker run -d \
 	--sysctl net.ipv6.conf.default.disable_ipv6=0 \
 	--cap-add NET_ADMIN \
 	--name tun2proxy \
-	image:tags
+	tun2proxy
 ```
 
-Provide a network to another worker container. (share netns).
+You can then provide the running container's network to another worker container by sharing the network namespace:
 
 ```bash
 docker run -it \
 	-d \
 	--network "container:tun2proxy" \
-	worker-example:tags
+	ubuntu:latest
 ```
 
-
-
 ## Configuration Tips
 ### DNS
 When DNS resolution is performed by a service on your machine or through a server in your local network, DNS resolution