Add buildoptions

README.md

@@ -123,6 +123,22 @@ All `buildargs` will be masked, so that they don't appear in the logs.
     buildargs: MY_FIRST,MY_SECOND
 ```
 
+### buildoptions
+Use `buildoptions` when you want to configure [options](https://docs.docker.com/engine/reference/commandline/build/#options) for building.  
+
+```yaml
+- name: Publish to Registry
+  uses: elgohr/Publish-Docker-Github-Action@master
+  env:
+    MY_FIRST: variableContent
+    MY_SECOND: variableContent
+  with:
+    name: myDocker/repository
+    username: ${{ secrets.DOCKER_USERNAME }}
+    password: ${{ secrets.DOCKER_PASSWORD }}
+    buildoptions: "--compress --force-rm"
+```
+
 ### cache
 Use `cache` when you have big images, that you would only like to build partially (changed layers).  
 > CAUTION: Docker builds will cache non-repoducable commands, such as installing packages. If you use this option, your packages will never update. To avoid this, run this action on a schedule with caching **disabled** to rebuild the cache periodically.