chore: added github action based build jobs

.github/workflows/pull-build-image.yaml

@@ -0,0 +1,18 @@
+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: nats-manager
+      dockerfile: Dockerfile
+      context: .
+      export-tags: true

.github/workflows/push-build-image.yaml

@@ -0,0 +1,39 @@
+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: nats-manager
+      dockerfile: Dockerfile
+      context: .
+      tags: ${{ needs.compute-tags.outputs.tags }}

.github/workflows/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: nats-manager
+      dockerfile: Dockerfile
+      context: .
+      tags: ${{ needs.compute-tags.outputs.tags }}

Dockerfile

@@ -3,7 +3,7 @@ FROM europe-docker.pkg.dev/kyma-project/prod/external/library/golang:1.23.0-alpi
 ARG TARGETOS
 ARG TARGETARCH
 
-WORKDIR /workspace
+WORKDIR /app
 # Copy the Go Modules manifests
 COPY go.mod go.mod
 COPY go.sum go.sum
@@ -31,8 +31,8 @@ FROM gcr.io/distroless/static:nonroot
 LABEL source = [email protected]:kyma-project/nats-manager.git
 
 WORKDIR /
-COPY --from=builder /workspace/manager .
-COPY --from=builder /workspace/resources/nats resources/nats
+COPY --from=builder /app/manager .
+COPY --from=builder /app/resources/nats resources/nats
 USER nonroot:nonroot
 
 ENTRYPOINT ["/manager"]