update README and docker-compose example

README.md

@@ -1,4 +1,42 @@
+[![](https://images.microbadger.com/badges/image/b4tman/squid.svg)](https://microbadger.com/images/b4tman/squid "Get your own image badge on microbadger.com")
+
 # docker-squid
 
-Docker Squid container based on Alpine Linux
+Docker Squid container based on Alpine Linux.
 
+Automated builds of the image are available on [Dockerhub](https://hub.docker.com/r/b4tman/squid).
+
+> **Note**: [armhf](https://github.com/b4tman/docker-squid/tree/armhf) image is based on **experimental** [armhf/alpine](https://hub.docker.com/r/armhf/alpine/) image. 
+
+# Quick Start
+
+Just launch container:
+
+```bash
+docker run -p 3128:3128 b4tman/squid
+```
+
+or use [docker-compose](https://docs.docker.com/compose/):
+
+```bash
+wget https://raw.githubusercontent.com/b4tman/docker-squid/master/docker-compose.yml
+docker-compose up
+```
+
+# Configuration
+
+## Environment variables:
+
+- **SQUID_CONFIG_FILE**: Specify the configuration file for squid. Defaults to `/etc/squid/squid.conf`.
+
+
+## Example:
+
+```bash
+docker run -p 3128:3128 \
+	--env='SQUID_CONFIG_FILE=/etc/squid/my-squid.conf' \
+	--volume=/srv/docker/squid/squid.conf:/etc/squid/my-squid.conf:ro \
+	b4tman/squid
+```
+
+This will start a squid container with your config file `/srv/docker/squid/squid.conf`. 

docker-compose.yml

@@ -1,7 +1,6 @@
 version: '2'
 services:
   squid:
-    build: .
     image: 'b4tman/squid'
     container_name: 'my-squid'
     restart: always