I run Drone CI (https://github.com/drone/drone https://github.com/drone/drone) on Digital Ocean. For ~5 dollars a month, I get all of my private repos built aut

I run Drone CI (https://github.com/drone/drone https://github.com/drone/drone) on Digital Ocean. For ~5 dollars a month, I get all of my private repos built automatically. I looked at Travis, Circle, &c., but they all seemed really expensive for private repos that may not be built > 50 times per month (with many not getting built per month).