Complete C# server cutover

server/config/README.md

@@ -1,17 +1,29 @@
 # Server Config
 
-This folder is for server configuration templates.
+The active server config is `../commonwealth-server.json`.
 
-Possible future config values:
+Supported fields:
 
-```text
-host=0.0.0.0
-port=7777
-max_players=2
-tick_rate=20
+```json
+{
+  "host": "0.0.0.0",
+  "port": 7777,
+  "server_name": "Commonwealth Online Server",
+  "server_description": "",
+  "max_players": 16,
+  "log_verbosity": "info",
+  "admin_port": 7779,
+  "enable_gns_transport": false,
+  "gns_bridge_path": null
+}
 ```
 
-`0.0.0.0` listens on all network interfaces. Use `127.0.0.1` only if you want
-local-only access again.
+Generate a default config with:
 
-Do not commit private IPs, tokens, or secrets.
+```bash
+dotnet run --project ../CommonwealthOnline.Server.csproj -- config init ../commonwealth-server.json
+```
+
+`0.0.0.0` listens on all IPv4 interfaces. `127.0.0.1` is local-only.
+
+Do not commit private tokens or runtime `.admin-token` state.