chore: Add GitHub Actions workflow for building Docker images

.github/workflows/pull_request.yml

@@ -0,0 +1,42 @@
+name: Build Docker Images
+
+on: pull_request
+
+env:
+  IMAGE_NAME: mtubev7
+  DOCKER_REPOSITORY: ${{ github.repository_owner }}
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
+      - name: Set up Docker Buildx
+        id: buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Log in to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
+
+      - name: Set outputs
+        id: vars
+        run: |
+          echo "branch=${GITHUB_HEAD_REF:-${GITHUB_REF#refs/heads/}}" >> $GITHUB_OUTPUT
+
+
+      - name: Build and push
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          platforms: linux/arm/v7
+          push: true
+          tags: |
+            ${{ env.DOCKER_REPOSITORY }}/${{ env.IMAGE_NAME }}:${{ steps.vars.outputs.branch }}