Add GitHub workflow to build docker image

Author: nalves599

.github/workflows/build.yml

@@ -0,0 +1,30 @@
+name: Build Workflow
+
+on:
+  push:
+
+jobs:
+  docker:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+
+    - uses: docker/setup-buildx-action@v3
+      name: Set up Docker Buildx
+
+    - uses: docker/login-action@v3
+      name: Login to DockerHub
+      with:
+        username: ${{ secrets.DOCKERHUB_USERNAME }}
+        password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+    - uses: docker/build-push-action@v6
+      name: Build and Push WebApp Image
+      id: docker_build
+      with:
+        context: .
+        push: true
+        tags: orgsinfo/webapp2:${{ github.ref_name }}
+
+    - name: WebApp Image Digest
+      run: echo ${{ steps.docker_build.outputs.digest }}