update: README.md

Author: lessuselesss

README.md

@@ -46,6 +46,8 @@
 
 > **Note for Windows Users:** [WSL 2](https://learn.microsoft.com/en-us/windows/wsl/install-manual) is required.
 
+### Development Environment
+
 ### Use the Starter (Recommended)
 
 ```bash
@@ -56,6 +58,14 @@ cp .env.example .env
 pnpm i && pnpm build && pnpm start
 ```
 
+#### Using Nix
+
+If you have [Nix](https://nixos.org/download.html) with flakes installed, you can enter the development environment with:
+
+```bash
+nix develop
+```
+
 Then read the [Documentation](https://ai16z.github.io/eliza/) to learn how to customize your Eliza.
 
 ### Manually Start Eliza (Only recommended if you know what you are doing)