fix cpp warnings, add doxygen to docker

common/cpp/include/asapo/common/networking.h

consumer/api/cpp/src/fabric_consumer_client.cpp

consumer/api/cpp/src/tcp_consumer_client.cpp

deploy/build_env/services-linux/Dockerfile

producer/api/cpp/src/producer_impl.cpp

receiver/src/request_handler/requests_dispatcher.cpp