added nginx autoproxy for exposes config, needs some refactoring

nixos/common/modules/meta.nix

@@ -20,15 +20,15 @@ let
     };
   };
 in {
-  options = {
-    meta.exposes = mkOption {
+  options.meta = {
+    exposes = mkOption {
       type = with types; attrsOf (submodule exposesOpts);
       description = ''
         Exposed services
       '';
     };
 
-    meta.ipv4 = mkOption {
+    ipv4 = mkOption {
       type = types.str;
       description = ''
         Own IPv4 Address

nixos/common/modules/vault.nix

@@ -2,7 +2,7 @@
 with lib;
 let
   cfg = config.services.v.vault;
-  hostIP = config.deployment.targetHost;
+  hostIP = config.meta.ipv4;
 
   # Find all vault hosts that do not have the same IP as the current host
   vault_hosts =