CI: Rework gvmd build container image

Change the gvmd-build container image build to be independent of changes
and releases of gvmd itself. The images only need to be rebuild if
gvm-libs has changed or if the base container image has new packages for
the dependencies. Therefore it isn't required to rebuild them on every
release, pull request or push.

Now only two flavors of the gvmd-build image exist. First
gvmd-build:stable which is based on the latest gvm-libs release and
second gvmd-build:edge which is based on the latest changes in
gvm-libs.

.github/workflows/build-container.yml

@@ -1,19 +1,6 @@
 name: Build Container Image Builds
 
 on:
-  push:
-    branches:
-      - main
-    tags: ["v*"]
-    paths:
-      - .github/workflows/build-container.yml
-      - .docker/build.Dockerfile
-  pull_request:
-    branches:
-      - main
-    paths:
-      - .github/workflows/build-container.yml
-      - .docker/build.Dockerfile
   workflow_dispatch:
   repository_dispatch:
   schedule:
@@ -22,13 +9,16 @@ on:
 
 jobs:
   build-images:
+    strategy:
+      matrix:
+        build:
+          - stable
+          - edge
     name: "Build Images"
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
         uses: actions/checkout@v4
-      - uses: greenbone/actions/is-latest-tag@v3
-        id: latest
       - name: Setup container meta information
         id: meta
         uses: docker/metadata-action@v5
@@ -39,30 +29,18 @@ jobs:
             org.opencontainers.image.base.name=greenbone/gvm-libs
           flavor: latest=false # no latest container tag for git tags
           tags: |
-            # use version, major.minor and major  for tags
-            type=semver,pattern={{version}}
-            type=semver,pattern={{major}}.{{minor}}
-            type=semver,pattern={{major}}
-
-            # use edge for default branch
-            type=edge
-
-            # set label for non-published pull request builds
-            type=ref,event=pr
-
-            # when a new git tag is created set stable and a latest tags
-            type=raw,value=latest,enable=${{ steps.latest.outputs.is-latest-tag == 'true' }}
-            type=raw,value=stable,enable=${{ steps.latest.outputs.is-latest-tag == 'true' }}
+            type=raw,value=latest,enable=${{ matrix.build == 'stable' }}
+            type=raw,value=stable,enable=${{ matrix.build == 'stable' }}
+            type=raw,value=edge,enable=${{ matrix.build == 'edge' }}
       - name: Set container build options
         id: container-opts
         run: |
-          if [[ "${{ github.ref_type }}" = 'tag' ]]; then
+          if [[ "${{ matrix.build }}" = 'stable' ]]; then
             echo "gvm-libs-version=oldstable" >> $GITHUB_OUTPUT
           else
             echo "gvm-libs-version=oldstable-edge" >> $GITHUB_OUTPUT
           fi
       - name: Login to DockerHub
-        if: github.event_name != 'pull_request'
         uses: docker/login-action@v3
         with:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
@@ -76,7 +54,6 @@ jobs:
         uses: docker/build-push-action@v5
         with:
           context: .
-          push: ${{ github.event_name != 'pull_request' }}
           build-args: |
             GVM_LIBS_VERSION=${{ steps.container-opts.outputs.gvm-libs-version }}
           file: .docker/build.Dockerfile