Use tomcat as servlet engine

README.md

@@ -4,7 +4,7 @@ Docker (http://docker.io) image for the Subsonic media streamer.
 
 ## Noteworthy
 
-* Subsonic 5.3.beta2 (http://www.subsonic.org)
+* Subsonic 5.3 (http://www.subsonic.org)
 
 ## Build your own image
 
@@ -35,10 +35,4 @@ $ docker run \
 
 ```
 
-## Configuration
-
-Specify env variables:
-
-  * CONTEXT_PATH =  The context path, i.e., the last part of the Subsonic URL. Typically '/' or '/subsonic'. Default '/'
-  * PORT = The port on which Subsonic will listen for incoming HTTP traffic. Default: 8080