small readme

README.md

@@ -1,4 +1,11 @@
 # dada-mail-docker
 
 Provides a Dockerfile to create a Dada-Mail docker image. In combination with a docker-compose.yml it also spawns a MariaDB.
-Also see: http://dadamailproject.com/
+Also see: http://dadamailproject.com/
+
+## First Start
+
+Spawn the server with docker-compose up and visit the url:
+
+http://localhost:8080/dada/installer/install.cgi 
+