Merge pull request 'Improve quickstart development docs' (#13) from update-readme into main

Reviewed-on: #13
Reviewed-by: b12f <hello@benjaminbaedorf.eu>

README.md

@@ -3,19 +3,30 @@
 This is the repository containing the code for https://pub.solar.
 
 It is built using [lume](https://lume.land/) with JSX. To get started, make sure
-you're loading all dependencies via `direnv`:
+you have the [nix package manager](https://nixos.org/download.html) installed.
+Then you can start developing with:
 
 ```
-$ direnv allow
+nix develop
 ```
 
-This will use nix shell to create an environment that has deno and lume
+This will use a [nix devshell](https://nix.dev/tutorials/first-steps/ad-hoc-shell-environments#ad-hoc-envs)
+to create an environment that has [deno](https://deno.land/) and [lume](https://lume.land/)
 available.
 
+An alternative approach for loading all dependencies is [`direnv`](https://direnv.net).
+It basically runs `nix develop` for you, once you enter a directory which
+contains a `.envrc` file and allow it by running `direnv allow`. Once installed
+globally, run:
+
+```
+direnv allow
+```
+
 To get a live development server, run
 
 ```
-$ deno task serve
+deno task serve
 ```
 
 Unfortunately, hot module reloading is currently broken for JSX modules, so