feat: add gopher64 N64 netplay server for Mario Party

Lightweight Go relay server (k4rian/gopher64-netplay-server) for N64
netplay. Supports Mario Party 1-3 with up to 4 players per room.
Players connect via gopher64/RMG emulator with their own ROM.

Ports: TCP+UDP 45000-45004 (lobby + 4 concurrent game sessions)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

docker/docker-compose.dev.yml

@@ -191,6 +191,29 @@ services:
         limits:
           memory: 2G
 
+  n64-netplay:
+    image: k4rian/gopher64-netplay-server:latest
+    container_name: n64-netplay
+    restart: unless-stopped
+    environment:
+      G64NS_NAME: "Afterlife N64 - Mario Party"
+      G64NS_PORT: 45000
+      G64NS_MAXGAMES: 4
+      G64NS_MOTD: "Bienvenido a Project Afterlife - Mario Party N64"
+      G64NS_LOGPATH: "gopher64-server.log"
+      G64NS_DISABLEBROADCAST: "false"
+      G64NS_ENABLEAUTH: "false"
+    ports:
+      - "45000-45004:45000-45004/tcp"
+      - "45000-45004:45000-45004/udp"
+    volumes:
+      - n64_netplay_data:/home/gopher64
+      - /etc/localtime:/etc/localtime:ro
+    deploy:
+      resources:
+        limits:
+          memory: 128M
+
 volumes:
   postgres_data:
   minio_data:
@@ -200,6 +223,7 @@ volumes:
   afc_bridge_data:
   sm64_save:
   sm64_mods:
+  n64_netplay_data:
   certbot_etc:
     external: true
     name: docker_certbot_etc