host.docker.internal

caddy/Caddyfile

@@ -31,7 +31,7 @@ www.bizmatch.net {
   #  file_server
   #}
   handle {
-    reverse_proxy localhost:4200
+    reverse_proxy host.docker.internal:4200
   }
   log {
     output file /var/log/caddy/access.prod.log  # Separate Logs
@@ -282,4 +282,4 @@ web.email-bayarea.com {
 # Dieser Block dient nur dazu, das Zertifikat für den Mailserver zu beschaffen/erneuern.
 mail.email-srvr.com {
     respond "Mailserver Certificate Authority is running." 200
-}
+}