feat: publish docker image to ghcr.io

ghcr.io: GitHub Packages ( https://docs.github.com/en/packages )

.github/workflows/build.yml

@@ -0,0 +1,68 @@
+name: Build & Push Docker Images
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+  workflow_dispatch:
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_BASENAME: uoj
+
+jobs:
+  build:
+    name: Build Image
+    runs-on: ubuntu-latest
+
+    permissions:
+      contents: read
+      packages: write
+
+    strategy:
+      matrix:
+        include:
+          - image_name: db
+            context: db
+            dockerfile: db/Dockerfile
+          - image_name: judger
+            context: judger
+            dockerfile: judger/Dockerfile
+          - image_name: web
+            context: .
+            dockerfile: web/Dockerfile
+      fail-fast: false
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Log in to the Container registry
+        uses: docker/login-action@v2.1.0
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: docker/metadata-action@v4.3.0
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_BASENAME }}-${{ matrix.image_name }}
+          tags: |
+            latest
+            type=ref,event=branch
+            type=ref,event=pr
+            type=sha,prefix=
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v3.3.0
+        with:
+          context: ${{ matrix.context }}
+          file: ${{ matrix.dockerfile }}
+          push: ${{ github.event_name == 'push' }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}

docker-compose.yml

@@ -2,6 +2,7 @@ version: '3'
 
 services:
   uoj-db:
+	image: ghcr.io/UniversalOJ/uoj-db:latest
     build:
       context: ./db/
       dockerfile: Dockerfile
@@ -14,6 +15,7 @@ services:
       - MYSQL_ROOT_PASSWORD=root
 
   uoj-judger:
+	image: ghcr.io/UniversalOJ/uoj-judger:latest
     build:
       context: ./judger/
       dockerfile: Dockerfile
@@ -34,6 +36,7 @@ services:
       - SOCKET_PASSWORD=_judger_socket_password_
 
   uoj-web:
+	image: ghcr.io/UniversalOJ/uoj-web:latest
     build:
       context: ./
       dockerfile: web/Dockerfile