Update cmake install for config

Author: Jackarain

CMakeLists.txt

@@ -560,5 +560,9 @@ endif()
 # 安装 proxy_server 服务
 
 configure_file(proxy.service.in proxy-server@.service)
+
 install(TARGETS proxy_server RUNTIME DESTINATION bin)
-install(FILES ${CMAKE_CURRENT_BINARY_DIR}/proxy-server@.service DESTINATION /usr/lib/systemd/system/)
+
+install(FILES ${CMAKE_CURRENT_BINARY_DIR}/proxy-server@.service DESTINATION /usr/lib/systemd/system/)
+install(FILES ${CMAKE_CURRENT_SOURCE_DIR}/doc/server.conf.example DESTINATION /etc/proxy_server/)
+install(FILES ${CMAKE_CURRENT_SOURCE_DIR}/doc/client.conf.example DESTINATION /etc/proxy_server/)