Added build pipeline

.github/workflows/build.yml

@@ -0,0 +1,31 @@
+name: CI Build and Push
+
+on:
+  pull_request:
+    types: [closed]
+    branches:
+      - master
+
+jobs:
+  build_and_push:
+    if: github.event.pull_request.merged == true && contains(github.event.pull_request.labels.*.name, 'CI:Build')
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v3
+
+      - name: Log in to DockerHub
+        uses: docker/login-action@v2
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Build Docker image
+        run: |
+          docker build -t ${{ secrets.DOCKERHUB_USERNAME }}/go-ethereum:latest .
+
+      - name: Push Docker image
+        run: |
+          docker push ${{ secrets.DOCKERHUB_USERNAME }}/go-ethereum:latest
+