README.md

@@ -3,3 +3,31 @@
 [![Netlify Status](https://api.netlify.com/api/v1/badges/7821f152-5b28-4dec-9d98-035a18e8a57a/deploy-status)](https://app.netlify.com/sites/tdpeuter-down/deploys)
 
 Ultra simple website to tell people a service is down
+
+## Starting the website
+
+```shell
+npm run start
+```
+
+## Setup networking
+
+### Using [Cloudflare](https://dash.cloudflare.com)
+
+If you want to use Cloudflare to handle redirection to the website, you can use [Page Rules](https://developers.cloudflare.com/support/page-rules/).
+
+First, make sure the DNS records for the (sub-) domains you want to redirect are [being proxied through Cloudflare](https://developers.cloudflare.com/dns/manage-dns-records/reference/proxied-dns-records). Then, head over to [Redirect Rules](https://developers.cloudflare.com/rules/url-forwarding/) (Page Rules are harder to configure, and it seems like [Cloudflare itself is more keen of Redirect Rules too](https://developers.cloudflare.com/support/page-rules/recommended-page-rules-to-consider/)).
+
+Create a Single Redirect rule that looks similar to:
+
+```
+# When incoming requests match...
+(http.host in {"example.com" "another.example.com"})
+
+# Then URL redirect
+Dynamic
+concat("https://your.host.tdl/?destination=", http.request.full_uri)
+302
+```
+
+Enable the rule and everything should be set!