A hosted version of Teation can be found at teation.com.
Documentation is still a work in progress. A bit of refactoring is still required before writing getting started instructions for development.
For now, check out the architecture documentation for a better understanding of the platform.
You can also check out the /apps/*/README.md files for more information about that particular app.
PRs are welcomed, however please submit a GitHub issue before working on a PR. This is a hobby project, therefore I may not be available to merge PRs while I'm working on other projects. I would also want to make sure that the changes are in line with the current roadmap.