start building dev and stable containers + tags for releases

.github/workflows/push_docker.yaml

@@ -25,12 +25,23 @@ jobs:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}
       - 
-        name: Build and push Docker image
+        name: Build and push Docker dev image
         uses: docker/build-push-action@v6
         with:
           context: .
           push: true
           platforms: linux/amd64,linux/arm64
-          tags: tonironaldbarth/hitster:latest
+          tags: tonironaldbarth/hitster:dev
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+      - 
+        name: Build and push Docker stable image
+        if: startsWith(github.ref, 'refs/tags') && !github.event_type != 'pull_request'
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          push: true
+          platforms: linux/amd64,linux/arm64
+          tags: tonironaldbarth/hitster:latest , tonironaldbarth/hitster:${{ github.ref_name }}
           cache-from: type=gha
           cache-to: type=gha,mode=max

README.md

@@ -127,10 +127,18 @@ Follow these steps to get a dev environment ready to run the project locally.
 The project is supposed to run inside a Docker container. As such, it holds a Dockerfile which builds the project. It also pushes docker images whenever a commit is created. If you just want to spin it up locally to give it a try, run the following command with Docker installed:
 
 ```sh
-docker run -p 8000:8000 tonironaldbarth/hitster
+docker run -p 8000:8000 tonironaldbarth/hitster:latest
 ```
 
-The Docker container currently only automatically gets built for amd64 and arm64, feel free to open an issue or pull request to add/request more build targets.
+Multiple containers are available to choose from:
+
+| tag | purpose |
+| --- | ------- |
+| latest | newest stable version |
+| dev | bleeding edge dev (might break unpredictably, contains all newest features that haven't been merged into stable) |
+| <release_name> | a specific release that won't change anymore, see the [list of available tags](https://github.com/Timtam/hitster/tags) for your possible options |
+
+The Docker containers currently only automatically gets built for amd64 and arm64, feel free to open an issue or pull request to add/request more build targets.
 
 If you want to build the container for yourself, clone the repository, open a command line and navigate into the project directory, then run the following commands: