Add HTTP error redirection to CADDY

Caddyfile

@@ -2,8 +2,17 @@ emacssurvey.tecosaur.net
 
 @dynamic {
 	not path /css/*
+	not path /favicon.ico
+	not path /robots.txt
 }
 reverse_proxy @dynamic localhost:8000
 
-root /css/* /opt/emacs-survey/public/css/
-file_server /css/style.css
+root * /opt/emacs-survey/public
+file_server
+
+handle_errors {
+	rewrite * /{err.status_code}
+	reverse_proxy https://http.cat {
+		header_up Host {upstream_hostport}
+	}
+}

setup.org

@@ -72,22 +72,42 @@ SETUPDIR=$(dirname "$(readlink --canonicalize-existing "$0")")
 #+end_src
 
 ** Caddy Config
+:PROPERTIES:
+:header-args:prog: :tangle Caddyfile
+:END:
 
 We just need to redirect to Genie for now, which makes for a rather simple
 config. The only complication is serving the static files through Caddy not
 Genie, for performance reasons (Genie recommends against serving static files
 with it).
 
-#+begin_src prog :tangle Caddyfile
+#+begin_src prog
 emacssurvey.tecosaur.net
 
 @dynamic {
 	not path /css/*
+	not path /favicon.ico
+	not path /robots.txt
 }
 reverse_proxy @dynamic localhost:8000
+#+end_src
 
-root /css/* /opt/emacs-survey/public/css/
-file_server /css/style.css
+We'll just pass all other requests to the public folder of the Emacs Survey.
+
+#+begin_src prog
+root * /opt/emacs-survey/public
+file_server
+#+end_src
+
+For HTTP errors we could re-use the Genie error pages ... or have some fun 🐱.
+
+#+begin_src prog
+handle_errors {
+	rewrite * /{err.status_code}
+	reverse_proxy https://http.cat {
+		header_up Host {upstream_hostport}
+	}
+}
 #+end_src
 
 Just this one file is all it takes to get Caddy set up to our liking 🙂.