Small home web server

I am looking into building or acquiring a small fairly silent low power web server for my home office. Reason is that I need to develop and run a small number of Ruby2 Rails 4 applications. These will have low traffic around 200 hits per day possibly up to 500 hits over 24 hours in heavy load times, but most of the time we expect 20-40 per day. It will be turned off at 10:30 pm and restarted about 8-9 am. It will be Centos or Fedora OS, Ubuntu has been recommended but I prefer Fedora. I have a TG782t modem. Have looked into shared servers, VPS, Heroku and each has more problems than enough. Shared servers won't host Rails. VPS is way too expensive for the small requirements High security is not needed, if it got hacked I'd just reinstall everything. But I do need my developer pc isolated against any attacks Heroku uses only postgres I would rather mariaDB, sqlite or mysql. Apparently postgres doesn't handle images too well but I have no knowledge on that. What would you recommend please. Help greatly appreciated Thanks in advance Roger