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+Rationale
+=========
+
+I started this project because the existing solutions sucked.
+I wanted a CI system that adheres to the following criteria.
+
+1. Painless integration with git hosting providers (especially Gitea, since
+   it's free and easy to self-host, and GitHub, since I use it the most).
+2. Pipeline configuration must be stored with the code.
+    * This disqualifies Buildbot and Concorse.
+      Buildbot requires pipeline configuration to be stored on the server
+      side, which is stupid.
+      There are some hacks, but they're lame.
+      Concorse is the same, and it's `set-pipeline` hack is even more lame.
+3. Support for multiple projects.
+    * This pretty much disqualifies Buildbot again.
+4. Easy configuration and set up.
+    * This disqualifies Jenkins, Buildbot and Concorse.
+      I've been working as a software developer for 10 years, and I can
+      recognize when something's over-engineered and over-complicated.
+5. Easy and free to self-host.
+    * This disqualifies all the major cloud providers, like GitHub and
+      GitLab.
+6. Free in license and in spirit.
+    * This disqualifies Drone.io, which I think would be pretty nice
+      otherwise.
+7. Not yet another custom file format.
+    * I'm a bit tired of converting pipelines from .travis.yml to
+      .github/workflows/ci.yml to Jenkinsfile and vice versa.
+      Shell scripts all the way.
+8. Stateless pipeline runs in containers.
+    * This is something that should be very easy to configure, Docker
+      should be first-class.
+9. You must be able to run pipelines locally to test your changes.
+    * Pretty much none of the solutions (maybe only Concorse) make this an
+      option.
+10. The UI should look like shit.
+    * Woodpecker, you're out.
+
+Pretty much I would like something like Drone.io, but free in spirit and in
+license, and without a custom YAML format.