Add description for other params.

Dockerfile

@@ -1,6 +1,7 @@
 FROM moby/buildkit
 
 COPY entrypoint.sh /usr/local/bin/entrypoint.sh
+COPY entrypoint.sh /usr/local/bin/build
 ENTRYPOINT [ "entrypoint.sh" ]
 
 

README.md

@@ -8,9 +8,15 @@ Currently only the docker registry is supported.
 
 ## parameters
 
+- repository: Required. The repository of the image.
+- tag: Optional. The tag for the image, default: `latest`
+- additional_tags: Optional. Path to a file containing one additional tag per line.
+- push: Optional. Should the built image be pushed, default: `false`
+- platform: Optional. A comma seperated list of target platforms, default: current platform
+- context: The context with which to build.
+- manual: Optional. Don't use params and instead supply all arguments via the command line, default: `false`
 - username: Optional. The username used to log into the registry.
 - password: Optional. The password used to log into the registry.
-
 ## Example
 
 To view a simple invocation just look at [pipeline.yml](ci/pipeline.yml).