docs: add DCO and contributing guide

Signed-off-by: Marvin Beckers <[email protected]>

CONTRIBUTING.md

@@ -0,0 +1,34 @@
+# Contributing
+
+Thank you for considering to contribute to kubeconfig-bikeshed! Please see the following information regarding contributions.
+
+## License
+
+kubeconfig-bikeshed is licensed under [Apache-2.0](./LICENSE).
+
+## Developer Certificate of Origin (DCO)
+
+By contributing to kubeconfig-bikeshed you agree to the Developer Certificate of Origin (DCO), which has originally been created by the Linux Foundation for the Linux kernel developer community. It certifies that you have a legal right to ma.
+
+To sign your work, just add a line like this at the end of your commit message (this can also be done with the `--signoff` / `-S` flag):
+
+```
+Signed-off-by: Joe Example <[email protected]>
+```
+
+By doing so you certify that you make a contribution in accordance with the [DCO](./DCO) file in this repository.
+
+## Conventional Commits
+
+This repository uses [conventional commits](https://www.conventionalcommits.org/en/v1.0.0/) starting from May 25, 2024. [sidero/conform](https://github.com/siderolabs/conform) is used to validate and enforce it.
+
+It is possible to set up a commit hook to run `conform` on commits. This is not necessary to contribute as conventional commits can be verified with any compatible tool.
+
+```sh
+cat <<EOF | tee .git/hooks/commit-msg
+#!/bin/sh
+
+conform enforce --commit-msg-file \$1
+EOF
+chmod +x .git/hooks/commit-msg
+```

DCO

@@ -0,0 +1,34 @@
+Developer Certificate of Origin
+Version 1.1
+
+Copyright (C) 2004, 2006 The Linux Foundation and its contributors.
+
+Everyone is permitted to copy and distribute verbatim copies of this
+license document, but changing it is not allowed.
+
+
+Developer's Certificate of Origin 1.1
+
+By making a contribution to this project, I certify that:
+
+(a) The contribution was created in whole or in part by me and I
+    have the right to submit it under the open source license
+    indicated in the file; or
+
+(b) The contribution is based upon previous work that, to the best
+    of my knowledge, is covered under an appropriate open source
+    license and I have the right under that license to submit that
+    work with modifications, whether created in whole or in part
+    by me, under the same open source license (unless I am
+    permitted to submit under a different license), as indicated
+    in the file; or
+
+(c) The contribution was provided directly to me by some other
+    person who certified (a), (b) or (c) and I have not modified
+    it.
+
+(d) I understand and agree that this project and the contribution
+    are public and that a record of the contribution (including all
+    personal information I submit with it, including my sign-off) is
+    maintained indefinitely and may be redistributed consistent with
+    this project or the open source license(s) involved.

README.md

@@ -129,6 +129,10 @@ Existing label values can only be updated if `--overwrite` is set, mimicking `ku
 
 By default, this command runs in "dry mode", which means it will not delete any kubeconfigs (as this is a destructive action potentially elevated by temporary networking problems). To actually prune kubeconfigs, pass `--dry-run=false` to the command.
 
+## Contributing
+
+If you are interested in contributing to `kbs` please check out the [contribution guidelines](./CONTRIBUTING.md).
+
 ## Alternatives
 
 - [konf-go](https://github.com/SimonTheLeg/konf-go) by my colleague Simon, if you are looking for a more mature solution written in Go.