Add instructions for personal use to README

README.md

@@ -13,3 +13,44 @@ library, which is a port of
 written in React and interfaces with
 [Monaco](https://github.com/microsoft/monaco-editor), the same text editor that
 powers VS Code.
+
+## Development setup
+
+To run this application, you need to install Rust, `wasm-pack`, and Node.js.
+Then, build the WebAssembly portion of the app:
+
+```
+wasm-pack build rustpad-core
+```
+
+When that is complete, you can install dependencies for the frontend React
+application with:
+
+```
+npm install
+```
+
+Finally, compile and run the backend web server with:
+
+```
+cargo run
+```
+
+While the backend is running, open another shell and run the following command
+to start the frontend portion.
+
+```
+npm start
+```
+
+This command will open a browser window to `http://localhost:3000`, with hot
+reloading on changes.
+
+## Deployment
+
+Rustpad is distributed as a single ~10 MB Docker image, which is built from the
+`Dockerfile` in this repository. We use GitHub Actions to automatically build
+new images on every push to the `main` branch.
+
+We continuously deploy a single container of this image to the
+[DigitalOcean App Platform](https://www.digitalocean.com/products/app-platform/).