w00t this Caddyfile was able to work in development!

modified:   .gitignore
	new file:   Caddyfile

.gitignore

@@ -27,3 +27,5 @@ coverage
 test
 
 *.dkim.key
+
+caddy

Caddyfile

@@ -0,0 +1,24 @@
+# download caddy. 
+#
+# wget "https://caddyserver.com/api/download?os=linux&arch=amd64&idempotency=73105841751083" -O caddy; chmod 755 caddy;
+#
+# This is the global config for all sites defined in this Caddyfile.
+{
+	# https://caddyserver.com/docs/caddyfile/options#on-demand-tls
+	on_demand_tls {
+		ask http://localhost:6001/ask-for-on-demand-tls
+		interval 2m
+		burst 5
+	}
+	#log {
+	#	output file out.log
+	#	level DEBUG
+	#}
+}
+
+https:// {
+	tls {
+		on_demand
+	}
+	reverse_proxy localhost:6001
+}