Multi-stage Dockerfile: build Maven inside Docker

.gitea/workflows/deploy.yml

@@ -15,12 +15,6 @@ jobs:
           git clone http://172.17.0.1:3000/kurihada/auth-backend.git .
           git checkout ${{ github.sha }}
 
-      - name: Install Maven
-        run: apt-get update -qq && apt-get install -y -qq maven
-
-      - name: Build with Maven
-        run: mvn clean install -Dmaven.test.skip=true
-
       - name: Build Docker image
         run: docker build -t auth-backend:latest .
 

Dockerfile

@@ -1,12 +1,18 @@
-# 多阶段构建 Dockerfile
+# Stage 1: Build with Maven
-# 阶段1: 构建
+FROM openjdk:21 AS builder
+
+WORKDIR /app
+COPY pom.xml .
+COPY src ./src
+
+RUN apt-get update && apt-get install -y maven && mvn clean install -Dmaven.test.skip=true
+
+# Stage 2: Runtime
 FROM openjdk:21
 
 WORKDIR /app
-
+COPY --from=builder /app/target/auth-backend-1.0.0.jar /app/
-COPY target/auth-backend-1.0.0.jar /app/
 
 EXPOSE 9001
 
-# 启动应用
 CMD ["java", "-jar", "auth-backend-1.0.0.jar"]