build: 添加Github action脚本

.github/workflows/build.yml

@@ -0,0 +1,25 @@
+name: build
+on:
+  push:
+    branches:
+      - dev
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        # 安装 JDK 17
+      - name: Set up JDK 17
+        uses: actions/setup-java@v4
+        with:
+          distribution: 'adopt'
+          java-version: '17'
+        # 执行 Gradle 构建
+      - name: Build with Gradle
+        run: ./gradlew build
+        # 上传构建产物
+      - name: Upload artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: Subit ForumBackendKtor Artifact
+          path: build/libs/*.jar