fix(pm/teal/midnight): Fix routes to midnight

if midnight is not connected to tailscale then nginx will fail to start,
if we instead point to the direct IP on the local network then so long as
midnight is online it will always start

packetmix/systems/teal/cache.nix

···
     acmeRoot = null;
 
     locations."/" = {
-      proxyPass = "http://midnight:1025";
+      proxyPass = "http://192.168.1.1:1025";
       recommendedProxySettings = true;
       proxyWebsockets = true;
     };

packetmix/systems/teal/spindle.nix

···
     acmeRoot = null;
 
     locations."/" = {
-      proxyPass = "http://midnight:1024";
+      proxyPass = "http://192.168.1.1:1024";
       recommendedProxySettings = true;
       proxyWebsockets = true;
     };