Protect latest from pre-releases (#336)

Fixes #318

.github/workflows/docker-hub-latest.yml

@@ -0,0 +1,48 @@
+# Copied from https://github.com/matrix-org/matrix-bifrost/blob/develop/.github/workflows/docker-hub-release.yml
+# This is duplicated with docker-hub-release.yml the only difference is the tag and hook
+
+name: "Docker Hub - Latest"
+
+on:
+  release:
+    types: [released]
+
+env:
+  DOCKER_NAMESPACE: gnuxie
+  PLATFORMS: linux/amd64,linux/arm64
+
+jobs:
+  docker-release:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out
+        uses: actions/checkout@v4
+      - name: Get release tag
+        run: echo "RELEASE_VERSION=${GITHUB_REF#refs/*/}" >> $GITHUB_ENV
+      - name: Unshallow for git describe so we can create version.txt
+        run: git fetch --prune --unshallow --tags --all --force
+      - name: Prepare version file
+        run: git describe > version.txt
+
+      # Needed for multi platform builds
+      - name: Set up QEMU
+        uses: docker/[email protected]
+
+      - name: Set up Docker Buildx
+        uses: docker/[email protected]
+
+      - name: Log in to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Build image
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          file: ./Dockerfile
+          platforms: ${{ env.PLATFORMS }}
+          push: true
+          tags: |
+            ${{ env.DOCKER_NAMESPACE }}/draupnir:latest

.github/workflows/docker-hub-release.yml

@@ -1,4 +1,5 @@
 # Copied from https://github.com/matrix-org/matrix-bifrost/blob/develop/.github/workflows/docker-hub-release.yml
+# This is duplicated with docker-hub-latest.yml the only difference is the tag and hook
 
 name: "Docker Hub - Release"
 
@@ -45,4 +46,3 @@ jobs:
           push: true
           tags: |
             ${{ env.DOCKER_NAMESPACE }}/draupnir:${{ env.RELEASE_VERSION }}
-            ${{ env.DOCKER_NAMESPACE }}/draupnir:latest