Improve repo tooling (#398)

* add basic git files to root

* make server part of monorepo

* import promo

* import libraries base

* import docs

* import desktop

* move docs and promo

sites/docs/src/content/docs/admin/guides/exposing.md

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+---
+title: Exposing your instance
+---
+
+Exposing your instance allows it to be accessible from other computers than the one you're hosting it on.
+
+## Setting `EXTERNAL_URL`
+
+Drop uses `EXTERNAL_URL` for creating invitation links, OIDC redirects, and everything else. It should be passed as an environment variable, and include the protocol, ip/domain, and port (if applicable). Examples include:
+
+- `http://192.168.0.100:3000`
+- `https://drop.my.domain/`
+- `http://drop.home.arpa:3000`
+
+Drop automatically parses and formats the URL, so there are no requirements on the format, as long as it is a valid URL.
+
+## LAN
+
+The `compose.yaml` provided in the [Quickstart guide](/admin/quickstart/) already exposes the Drop instance on port 3000. If you're on the same LAN as your Drop instance, you can find it's IP and then use:
+
+```
+http://[instance IP]:3000
+```
+
+as the connection URL when setting up your Drop client.
+
+## Reverse Proxy
+
+If you are unsure how to set up a reverse proxy, or even what one is, this guide isn't for you. There are far better guides out there, so follow them to set up your reverse proxy.
+
+There is no special configuration required to run Drop behind a reverse proxy.
+
+## VPN
+
+If you are unsure how to set up a VPN for remote access, please find and follow a far better guide than this one.
+
+Accessing Drop over a VPN works very similarly to [accessing via LAN](#lan), so follow those steps.