docs: basic readme

Author: thekaveman

README.md

@@ -0,0 +1,11 @@
+# Compiler's Technical Documentation
+
+Published online at <https://docs.compiler.la>
+
+## What is this repository for?
+
+This is Compiler's [GitHub Pages organization repository](https://docs.github.com/en/pages/getting-started-with-github-pages/about-github-pages#types-of-github-pages-sites), served under a custom domain using a
+[CNAME](https://github.com/compilerla/compilerla.github.io/blob/main/CNAME) file.
+
+This site is the root of Compiler's GitHub Pages project sites - the repositories that have GitHub Pages enabled.
+These sites are automatically available at `https://docs.compiler.la/repo-name`.