Initial commit: DataTool backend, frontend and Docker

docker/Dockerfile

@@ -0,0 +1,38 @@
+# ========== 阶段一：构建前端 dist ==========
+FROM node:20-alpine AS frontend-builder
+
+WORKDIR /app/frontend
+
+COPY frontend/package.json frontend/package-lock.json* ./
+RUN npm ci --ignore-scripts || npm install --legacy-peer-deps
+
+COPY frontend/ ./
+RUN npm run build
+
+# ========== 阶段二：构建后端 JAR（含 dist 到 static） ==========
+FROM eclipse-temurin:17-jdk-alpine AS backend-builder
+
+WORKDIR /app
+
+# 安装 Maven
+RUN apk add --no-cache maven
+
+COPY backend/ ./backend/
+COPY --from=frontend-builder /app/frontend/dist ./backend/src/main/resources/static
+
+WORKDIR /app/backend
+RUN mvn package -DskipTests -q -B
+
+# ========== 阶段三：运行 ==========
+FROM eclipse-temurin:17-jre-alpine
+
+WORKDIR /app
+
+# 上传目录与数据持久化
+RUN mkdir -p /app/data/uploads
+
+COPY --from=backend-builder /app/backend/target/datatool-backend-*.jar ./app.jar
+
+EXPOSE 8080
+
+ENTRYPOINT ["java", "-jar", "app.jar"]