added manually triggered workflow for testing stuff

Author: jksolbakken

.github/workflows/manual_testing.yml

@@ -0,0 +1,50 @@
+name: Manually triggered playground
+
+on:
+  workflow_dispatch:
+
+env:
+  IMAGE_NAME: ghcr.io/${{ github.repository }}
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout latest code
+        uses: actions/checkout@v3
+        with:
+          ref: add-arm64-architecture
+
+      - name: Set up JDK 11
+        uses: actions/setup-java@v3
+        with:
+          java-version: 11
+          distribution: 'zulu'
+
+      - name: Setup build cache
+        uses: actions/cache@v3
+        with:
+          path: ~/.gradle/caches
+          key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle.kts') }}
+          restore-keys: |
+            ${{ runner.os }}-gradle-
+
+      - name: Setup Gradle wrapper cache
+        uses: actions/cache@v3
+        with:
+          path: ~/.gradle/wrapper
+          key: ${{ runner.os }}-gradle-wrapper-${{ hashFiles('gradle/wrapper/gradle-wrapper.properties') }}
+          restore-keys: |
+            ${{ runner.os }}-gradle-wrapper-
+
+      - name: Build JVM stuff
+        run: ./gradlew build
+
+      - name: Build Docker images for amd64 and arm64
+        # The GITHUB_REF tag comes in the format 'refs/tags/xxx'.
+        # So if we split on '/' and take the 3rd value, we can get the release name.
+        run: |
+          NEW_VERSION=$(git rev-parse --short HEAD)
+          IMAGE=${IMAGE_NAME}:${NEW_VERSION}
+          echo "Building new version ${NEW_VERSION} of $IMAGE"
+          ./gradlew jibDockerBuild --image="${IMAGE}"