Added basic README.

README.md

@@ -0,0 +1,30 @@
+# docker-mailserver
+
+## installation
+
+TODO when automatic build will be enabled.
+
+## build
+
+	docker build -t tvial/docker-mailserver .
+
+## docker-compose template
+
+	mail:
+	  build: .
+	  hostname: mail
+	  domainname: my-domain.com
+	  ports:
+	  - "25:25"
+	  - "143:143"
+	  - "587:587"
+	  - "993:993"
+	  volumes:
+	    - ./configs/courier:/etc/courier
+	    - ./configs/postfix:/etc/postfix
+	    - ./configs/spamassassin:/etc/spamassassin
+	  environment:
+	    docker_mail_domain: "my-domain.com"
+	    docker_mail_users:
+	      - "username1@my-domain.com|username1password"
+	      - "username2@my-domain.com|username2password"