Update pgadmin services with fixed IP and services dependencies

Move .codesandbox/servers.json -> pgadmin_servers.json

pgadmin_servers.json

@@ -0,0 +1,13 @@
+{
+  "Servers": {
+    "dev": {
+      "Name": "PostgSail dev db",
+      "Group": "Servers",
+      "Port": 5432,
+      "Host": "172.30.0.2",
+      "SSLMode": "prefer",
+      "MaintenanceDB": "postgres",
+      "Username": "postgres"
+    }
+  }
+}