Update Readme with details of Air proxy port and live reload

Adrian Simmons created

Signed-off-by: Adrian Simmons <adrinux@perlucida.co.uk>

Change summary

README.md | 6 ++++++
1 file changed, 6 insertions(+)

Detailed changes

README.md 🔗

@@ -233,3 +233,9 @@ git config format.signOff yes
 [reuse-shield]: https://shields.io/reuse/compliance/git.sr.ht/~amolith/willow
 [fosspay]: https://secluded.site/donate/
 [fosspay-shield]: https://shields.io/badge/donate-fosspay-yellow
+
+#### Using Air
+
+Running Air using Willow's supplied Air configuration: `air -c air.toml` launches Willow on [localhost:1313](http://localhost:1313).
+
+If you're working on HTML or CSS then use Air's proxy port instead [localhost:8888](http://localhost:8888) to get live reloading in the browser on every change.