first attempt at ci/cd

.gitea/workflows/main.yaml

@@ -0,0 +1,29 @@
+name: Base DNS Docker Image CI/CD Build
+on: [push]
+
+jobs:
+  build-docker-image:
+    runs-on: main
+    env:
+      CONTAINER_NAME: "${{ vars.CONTAINER_REGISTRY_HOSTNAME }}/dns/base"
+      MAJOR_VERSION: 0
+    steps:
+      - name: Check out repository code
+        uses: actions/checkout@v4
+      - name: Build Docker image with run number tag
+        run: |
+          docker build \
+          --tag $CONTAINER_NAME:$MAJOR_VERSION.${{ github.run_number }}  \
+          --no-cache .
+      - name: Push Docker image with run number tag
+        run: |
+          docker push $CONTAINER_NAME:$MAJOR_VERSION.${{ github.run_number }}
+      - name: Tag and push Docker image as latest if on master branch
+        if: github.ref == 'refs/heads/master'
+        run: |
+          docker tag $CONTAINER_NAME:$MAJOR_VERSION.${{ github.run_number }} $CONTAINER_NAME:latest
+          docker push $CONTAINER_NAME:latest
+      - name: Clean up docker images
+        run: |
+          docker rmi $CONTAINER_NAME:latest || true # Avoid failure if 'latest' tag does not exist
+          docker rmi $CONTAINER_NAME:$MAJOR_VERSION.${{ github.run_number }}