ci(workflow): add workflow to build and push image

.github/workflows/build-docker.yml

@@ -0,0 +1,33 @@
+name: Build and Push Docker Image
+
+on:
+  push:
+    paths:
+      - "ipregion.sh"
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Log in to Docker Hub
+        uses: docker/login-action@v2
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          file: Dockerfile
+          push: true
+          tags: ${{ secrets.DOCKERHUB_USERNAME }}/ipregion:latest
+          platforms: linux/amd64