You can simply read source code with Web Browser !!

1. Preparing the Docker environment

$ docker build -t reading .
$ docker run -p 8888:80 -itd reading # Access to http://localhost:8888/src/hogehoge/HTML

1. Putting source codes that you want to read /usr/local/src and creating html files with gtags and htags commands
2. Access to http://localhost:8888/src/hogehoge/HTML with the web browser