Add CONTRIBUTING.md

CONTRIBUTING.md

@@ -0,0 +1,40 @@
+<!--
+© 2024 Vlad-Stefan Harbuz <[email protected]>
+SPDX-License-Identifier: CC-BY-SA-4.0
+-->
+
+# Contributing
+
+This document contains various bits of information that might be useful for contributors.
+
+## Running Locally
+
+To run locally:
+
+```
+npx astro dev
+```
+
+Make sure you run TypeScript checks after making TypeScript changes:
+
+```
+npx astro check
+```
+
+## New Member Workflows
+
+When a new member joins, workflows are run to update `src/content/members`. The workflow can be found in
+`.github/workflows/deploy.yml`, and the code that updates member data can be found in `bin/`.
+
+## Copyright Headers
+
+We maintain copyright headers at the top of every file to establish authorship. Once you make substantive changes to any
+file, add yourself to the copyright headers.
+
+Remember that copyright statements such as “(C) John Smith 2020” contain the year copyright _started_, i.e. 2020 is the
+year the work was first created, not the current year.
+
+## Browser Support
+
+The least-supported clientside feature we're using is CSS Nesting. This means that our supported browser are described
+by the [CSS Nesting Can I Use page](https://caniuse.com/css-nesting).

README.md

@@ -26,8 +26,8 @@ Open Source Pledge is brought to you by [Sentry][sentry] and [contributors][cont
 * **Want to make the Pledge?** Find out [how to join][join].
 * **Want to participate as a maintainer, foundation or funding platform?** Join an upcoming [ecosystem partners
   call][ecosystem-call] to learn more and be heard.
-* **Want to help?** [Dive into our issues][issues] or reach out to the working group leads listed below either in issues
-  or [on Discord][discord].
+* **Want to help?** Read [CONTRIBUTING.md](CONTRIBUTING.md), [dive into our issues][issues], and feel free to reach out
+  to the working group leads either in issues or [on Discord][discord].
 
 [contributors]: (https://github.com/opensourcepledge/osspledge.com/graphs/contributors).
 [discord]: https://discord.gg/svH5XzDsBd