Easy get the app running steps:
1. Install
2. Edit the config to point at your homeserver
3. Run the app!
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This is made possible thanks to the change we made in https://github.com/matrix-org/matrix-public-archive/pull/20#discussion_r897567619 to start using a scoped custom version of `hydrogen-view-sdk`. This includes all of the scratch changes necessary to get this project running which makes the `npm install` just work out of the box without all of the `npm link` hassle.