add build step

.github/workflows/slsa.yaml

@@ -4,11 +4,51 @@ on: [push]
 permissions: read-all
 
 jobs:
-  build:
+  staging-okr-deploy:
+    if: github.event.pull_request.merged == true
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout project
+        uses: actions/checkout@v2
+        with:
+          token: ${{secrets.VERSION_TOKEN}}
+
+      - name: Set up JDK 17
+        uses: actions/setup-java@v2
+        with:
+          java-version: '17'
+          distribution: 'adopt'
+          server-id: github
+          settings-path: ${{github.workspace}}
+
+      - name: Generate and Set New Version
+        run: mvn build-helper:parse-version versions:set -DnewVersion=\${parsedVersion.majorVersion}.\${parsedVersion.minorVersion}.\${parsedVersion.nextIncrementalVersion} -DgenerateBackupPoms=false
+
+      - name: Extract Maven project version
+        run: echo "version=$(mvn -q -Dexec.executable=echo -Dexec.args='${project.version}' --non-recursive exec:exec)" >> $GITHUB_OUTPUT
+        id: store-version
+
+
+      - name: Set New Snapshot Version
+        run: mvn build-helper:parse-version versions:set -DnewVersion=${{ steps.store-version.outputs.version}}-SNAPSHOT -DgenerateBackupPoms=false
+
+      - name: Set up node 16
+        uses: actions/setup-node@v3
+        with:
+          node-version: 16
+
+      - name: Install Dependencies
+        run: cd ./frontend && npm ci
+
+      - name: Build frontend with Angular
+        run: cd ./frontend && npm run build:staging
+
+      - name: Build backend with Maven
+        run: mvn -B clean package --file pom.xml -P staging
+
+  provenance:
     permissions:
       id-token: write # For signing.
       contents: read # For repo checkout of private repos.
       actions: read # For getting workflow run on private repos.
-    uses: slsa-framework/slsa-github-generator/.github/workflows/builder_maven_slsa3.yml@main
-    with:
-      directory: ./backend
+    uses: slsa-framework/slsa-github-generator/.github/workflows/builder_maven_slsa3.yml@main