added github action based build jobs (kyma-project#167)

.github/pull-build-image.yaml

@@ -0,0 +1,35 @@
+name: Pull Build Image
+
+on:
+  pull_request_target:
+    types: [opened, edited, synchronize, reopened, ready_for_review]
+
+permissions:
+  id-token: write # This is required for requesting the JWT token
+  contents: read # This is required for actions/checkout
+
+jobs:
+  build:
+    uses: kyma-project/test-infra/.github/workflows/image-builder.yml@main
+    with:
+      name: eventing-publisher-proxy
+      dockerfile: Dockerfile
+      context: .
+      export-tags: true
+  test-image:
+    runs-on: ubuntu-latest
+    needs: build
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Install jq
+        run: sudo apt-get install jq
+
+      - name: Extract image name from JSON
+        id: extract-image
+        run: |
+          echo "IMAGE_NAME=$(echo '${{ needs.build.outputs.images }}' | jq -r '.[0]')" >> $GITHUB_ENV
+
+      - name: Test image
+        run: ./scripts/shell/run-and-check-container.sh "$IMAGE_NAME" PR-${{ github.event.number }}-container

.github/push-build-image.yaml

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+name: Push Build Image
+
+on:
+  push:
+    branches:
+      - "main"
+      - "release-*"
+    paths-ignore:
+      - "docs/**"
+
+permissions:
+  id-token: write # This is required for requesting the JWT token
+  contents: read # This is required for actions/checkout
+
+jobs:
+  compute-tags:
+    runs-on: ubuntu-latest
+    outputs:
+      tags: ${{ steps.get_tag.outputs.TAGS }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Get the latest tag
+        id: get_tag
+        run: |
+          {
+            echo 'TAGS<<EOF'
+            echo "${{ github.sha }}"
+            echo "${{ github.ref_name}}"
+            echo EOF
+          } >> "$GITHUB_OUTPUT"
+  build:
+    needs: compute-tags
+    uses: kyma-project/test-infra/.github/workflows/image-builder.yml@main
+    with:
+      name: eventing-publisher-proxy
+      dockerfile: Dockerfile
+      context: .
+      tags: ${{ needs.compute-tags.outputs.tags }}

.github/tag-build-image.yaml

@@ -0,0 +1,37 @@
+name: Tag Build Image
+
+on:
+  push:
+    tags:
+      - '[0-9]+.[0-9]+.[0-9]+' # This will trigger the workflow when a tag (x.y.z) is pushed.
+
+permissions:
+  id-token: write # This is required for requesting the JWT token
+  contents: read # This is required for actions/checkout
+
+jobs:
+  compute-tags:
+    runs-on: ubuntu-latest
+    outputs:
+      tags: ${{ steps.get_tag.outputs.TAGS }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Get the latest tag
+        id: get_tag
+        run: |
+          {
+            echo 'TAGS<<EOF'
+            echo "${{ github.sha }}"
+            echo "${{ github.ref_name}}"
+            echo EOF
+          } >> "$GITHUB_OUTPUT"
+  build:
+    name: build-${{ github.ref_name }} # The release pipeline will check the status of this job by this name format (e.g. build-1.0.1).
+    needs: compute-tags
+    uses: kyma-project/test-infra/.github/workflows/image-builder.yml@main
+    with:
+      name: eventing-publisher-proxy
+      dockerfile: Dockerfile
+      context: .
+      tags: ${{ needs.compute-tags.outputs.tags }}