Add initial PostgreSQL and pgAdmin services with Nomad configuration

1-nixos-node/configuration.nix

@@ -50,10 +50,19 @@
               path = "/opt/traefik";
               read_only = false;
             };
+            postgres = {
+              path = "/opt/postgres";
+              read_only = false;
+            };
           };
+          cni_path = "${pkgs.cni-plugins}/bin";
         };
         plugin.docker.config.allow_privileged = true;
       };
+      extraPackages = with pkgs; [
+        cni-plugins
+        consul
+      ];
     };
     consul = {
       enable = true;
@@ -65,6 +74,8 @@
         server = true;
         client_addr = "127.0.0.1 100.79.223.55";
         datacenter = "jaglan-beta";
+        connect.enabled = true;
+        ports.grpc = 8502;
       };
     };
     openssh = {
@@ -78,6 +89,8 @@
     "d /var/lib/alloc_mounts 0755 root root -"
     # Create a directory for Traefik to store its data (tls certs, etc.)
     "d /opt/traefik 0755 root root -"
+    # Create a directory for Postgres to store its data
+    "d /opt/postgres 0755 root root -"
   ];
 
   # Open ports in the firewall. 464X are the default ports for Nomad.