Update application.yml to disable resource mapping for improved SPA handling

docker/backend.Dockerfile

@@ -0,0 +1,33 @@
+# Backend: Maven 使用阿里云镜像，多阶段构建
+FROM maven:3.9-eclipse-temurin-8-alpine AS builder
+
+# 使用国内 Maven 配置（阿里云）
+COPY docker/maven-settings.xml /root/.m2/settings.xml
+
+WORKDIR /build
+
+# 先复制 pom，利用 Docker 层缓存
+COPY backend/pom.xml .
+RUN mvn dependency:go-offline -B -q
+
+COPY backend/src ./src
+RUN mvn package -DskipTests -B -q
+
+# 运行阶段
+FROM eclipse-temurin:8-jre-alpine
+
+RUN apk add --no-cache tzdata \
+    && cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime \
+    && echo "Asia/Shanghai" > /etc/timezone
+
+WORKDIR /app
+
+COPY --from=builder /build/target/*.jar app.jar
+
+# 数据目录（H2 数据库文件）
+ENV DATA_DIR=/app/data
+RUN mkdir -p ${DATA_DIR}
+
+EXPOSE 48080
+
+ENTRYPOINT ["java", "-jar", "app.jar"]