Use bashio for octoprint setup; disable auto-https

3dprinter-octoprint/rootfs/etc/caddy/Caddyfile

@@ -4,6 +4,7 @@
 		format console
 		output file /var/log/caddy/caddy.log
 	}
+	auto_https disable_redirects
 }
 
 import sites-enabled/*.caddy

3dprinter-octoprint/rootfs/etc/cont-init.d/octoprint.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/with-contenv bashio
 # ==============================================================================
 # Prepare OctoPrint
 # s6-overlay docs: https://github.com/just-containers/s6-overlay