Switch Minecraft server to FTB StoneBlock 4 (name + modpack metadata)

config.json, discordBot.js, serverUpdates.js and ServerCard.jsx updated from Biohazard to FTB StoneBlock 4. Docs (infrastructure/gsm/CLAUDE) updated and docs/minecraft-modpack-install.md added. No Discord update notification is triggered (minecraft supportsUpdate=false).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

gsm-backend/services/discordBot.js

@@ -16,7 +16,7 @@ const previousPlayerLists = new Map();
 
 // Server display config
 const serverDisplay = {
-  minecraft: { name: 'Biohazard: Project Genesis', icon: '⛏️', color: 0x4A7A2E, address: 'minecraft.zeasy.dev' },
+  minecraft: { name: 'FTB StoneBlock 4', icon: '⛏️', color: 0x8B8B8B, address: 'minecraft.zeasy.dev' },
   factorio: { name: 'Factorio', icon: '⚙️', color: 0xF97316, address: 'factorio.zeasy.dev' },
   zomboid: { name: 'Project Zomboid', icon: '🧟', color: 0x4ADE80, address: 'pz.zeasy.dev:16261' },
   vrising: { name: 'V Rising', icon: '🧛', color: 0xDC2626, address: 'vrising.zeasy.dev' },

gsm-backend/services/serverUpdates.js

@@ -545,10 +545,10 @@ const updateHandlers = {
     }
   },
 
-  // Minecraft Biohazard - Manual update required (modpack)
+  // Minecraft FTB StoneBlock 4 - Manual update required (modpack)
   minecraft: {
     supportsUpdate: false, // Modpacks need manual update
-    gameName: "Biohazard: Project Genesis"
+    gameName: "FTB StoneBlock 4"
   },
 
   // OpenTTD - Manual update required