docs: Include the code of conduct directly into the mdbook

Also update the link to the organizational code of conduct so that it works in
the rendered mdbook as well as when viewed on github.

Author: fitzgen

Diff for: CODE_OF_CONDUCT.md

@@ -44,6 +44,6 @@ Project maintainers who do not follow or enforce the Code of Conduct in good fai
 
 This Code of Conduct is adapted from the [Contributor Covenant][homepage], version 1.4, available at [http://contributor-covenant.org/version/1/4][version]
 
-[OCoC]: ORG_CODE_OF_CONDUCT.md
+[OCoC]: https://github.com/bytecodealliance/wasmtime/blob/master/ORG_CODE_OF_CONDUCT.md
 [homepage]: https://www.contributor-covenant.org
 [version]: https://www.contributor-covenant.org/version/1/4/

Diff for: docs/contributing-coc.md

@@ -1,3 +1 @@
-# Code of Conduct
-
-... more coming soon
+{{#include ../CODE_OF_CONDUCT.md }}