Licensing
Cobblr is source-available under the Functional Source License (FSL-1.1-ALv2). You can read the code, run it, change it, and build on it. You can self-host it for yourself, your team, or your company at no cost. The one thing the license holds back is using Cobblr to run a competing commercial service while a release is still new. Two years after a version ships, that version is additionally available under the Apache License 2.0, an ordinary open source license, and the competing-use restriction on it ends.
If you just want to run Cobblr on your own machine, that is covered from day one and you don't need to read further. If you plan to redistribute it, build a product on it, or fork it under a new name, the pages below spell out the terms in plain language. Start with The license, explained for what you may and may not do, and Trademark and forks for naming.