added workflow

Author: abhisawesome

.github/workflows/build-docker.yml

@@ -0,0 +1,33 @@
+name: Build Docker Image
+on:
+  push:
+    branches: [main, master]
+    paths:
+      - 'packages/server/**'
+  pull_request:
+    branches: [main, master]
+    paths:
+      - 'packages/server/**'
+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: Build Docker image
+        uses: docker/build-push-action@v5
+        with:
+          context: ./packages/server
+          file: ./packages/server/dockerfile
+          push: false
+          tags: proxyhub-server:latest
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+    # - name: Upload Docker image as artifact
+    #   uses: actions/upload-artifact@v4
+    #   with:
+    #     name: docker-image
+    #     path: /tmp/_buildx_build
+    #     retention-days: 1

packages/server/dockerfile

@@ -0,0 +1,12 @@
+FROM node:22.16.0-alpine
+
+WORKDIR /app
+
+COPY package*.json ./
+
+RUN npm ci --only=production
+
+RUN npm run build
+COPY . .
+
+CMD ["npm", "start"]