Add GitHub Actions workflow for Docker build and push

Author: coderaviverma

.github/workflows/docker.yml

@@ -0,0 +1,37 @@
+name: Docker Build & Push
+
+on:
+  push:
+    branches: ["main"]
+  workflow_dispatch:
+
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Login to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Build and push (latest)
+        uses: docker/build-push-action@v6
+        with:
+          context: ./docker
+          push: true
+          tags: jsonviewertool/json-viewer-tool:latest
+
+      - name: Sync README to Docker Hub
+        uses: peter-evans/dockerhub-description@v4
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+          repository: jsonviewertool/json-viewer-tool
+          readme-filepath: ./README.md