Readme and better pushing.

.github/workflows/docker.yaml

@@ -48,7 +48,7 @@ jobs:
       # complicated than it looks, and you have a lot of flexibility in
       # how you build tags here.
       id: meta
-      uses: docker/metadata-action@98669ae865ea3cffbcbaa878cf57c20bbf1c6c38
+      uses: docker/metadata-action@v5
       with:
         images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
     - name: Build and push docker

README.md

@@ -6,3 +6,11 @@ First, you can start with the quick-start docs from GitHub: https://docs.github.
 
 Then you can follow along with a few simple tutorial workflows.
 
+So far we have a simple example, which just checks out a Github repo containing one or more ROS packages and builds it within a default OSRF environment:
+
+[Simple Example](https://github.com/ethz-asl/asl-actions/blob/main/.github/workflows/simple.yaml)
+
+There is also an example of using the Github Container Registry to first build a custom docker image, push it to the container registry, and then use it in the following step to build the code itself:
+
+[Docker Example](https://github.com/ethz-asl/asl-actions/blob/main/.github/workflows/docker.yaml)
+