Archive Diff repository (#206)

Author: ericmj

.github/workflows/main.yml

@@ -1,18 +1,8 @@
 # Diff
 
-Website to display diffs between Hex package versions.
-
-## Contributing
-
-### Setup
-
-1. Run `mix setup` to install Hex and NPM dependencies
-2. Run `mix test`
-3. Run `mix phx.server` and visit [http://localhost:4004/](http://localhost:4004/)
-
-### Updating dependencies
-
-If Hex or NPM dependencies are outdated run `mix setup` again.
+This repository is archived. Hex package diffs are maintained as part of
+[hexpm/hexpm](https://github.com/hexpm/hexpm): its web interface and background
+processing both run in the Hexpm application.
 
 ## License