Follow the instructions in the README.md file to reset your Docker container and reinstall your app. If all goes well, congratulations! You have completed this Rails From Scratch protocol. The end result is used by my (GenericApp)[https://github.com/jhsu802701/generic_app] gem as a platform for starting a new Rails app. Given how grueling it is to proceed through the entire Rails From Scratch procedure EVEN WITH every step and every detail spelled out, it is essential to have a basic template always ready to go at a moment's notice. Having to reinvent the wheel means taking an excessive amount of time AND selling out quality control because the process is too slow.