chore: simplify documentation

docs/integration/Native.md

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+## Native Integration
+
+The Native integration allows you to run both Headplane and Headscale on
+bare-metal servers or virtual machines. This integration is best suited for
+environments where Docker or Kubernetes are not available or not desired.
+
+Currently the Native integration only supports automatic reloading of ACLs. It
+cannot handle configuration changes as killing the `headscale` process can lead
+to undefined behavior or the service not restarting.
+
+### Deployment
+
+Follow the instructions to install Headscale from the
+[Linux Installation Guide](https://headscale.net/running-headscale-linux/). As
+of now, Headplane requires Node.js 20 to be installed on the system. Once you
+are ready, clone the repository (`git clone https://github.com/tale/headplane`),
+install dependencies (`npm install`), build the project (`npm run build`), and
+start the server (`npm start`).
+
+> If you'd like, you can turn this into a `systemd` unit to manage the service.
+> I plan to provide packages and unit files to make this easier in the future.
+
+When running Headplane, you'll need to set environment variables to configure
+the application. The `HEADSCALE_INTEGRATION` variable should be set to `proc`.
+
+> For a breakdown of each configuration variable, please refer to the
+[Configuration](/docs/Configuration.md) guide. 
+> It explains what each variable does, how to configure them, and what the default values are.