feat: add gateway-service, analytics-service, update CI/CD

rag-service/docker/Dockerfile

@@ -0,0 +1,19 @@
+# Stage 1: Build
+FROM eclipse-temurin:25-jdk-alpine AS build
+WORKDIR /app
+COPY ../pom.xml .
+COPY ../.mvn .mvn
+COPY ../mvnw .
+RUN chmod +x mvnw && ./mvnw dependency:go-offline -B
+COPY ../src src
+RUN ./mvnw package -DskipTests -B
+
+# Stage 2: Run
+FROM eclipse-temurin:25-jdk-alpine
+WORKDIR /app
+RUN addgroup -S appgroup && adduser -S appuser -G appgroup
+COPY --from=build /app/target/*.jar app.jar
+RUN chown appuser:appgroup app.jar
+USER appuser
+EXPOSE 8080
+ENTRYPOINT ["java", "-jar", "app.jar"]