fix(gateway): load .env from monorepo root via dotenv

Gateway runs from apps/gateway/ via pnpm filter but .env lives at the
monorepo root. Added dotenv to resolve ../../.env first, then local
.env as override.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/gateway/package.json

@@ -20,9 +20,9 @@
     "@mosaic/coord": "workspace:^",
     "@mosaic/db": "workspace:^",
     "@mosaic/discord-plugin": "workspace:^",
-    "@mosaic/telegram-plugin": "workspace:^",
     "@mosaic/log": "workspace:^",
     "@mosaic/memory": "workspace:^",
+    "@mosaic/telegram-plugin": "workspace:^",
     "@mosaic/types": "workspace:^",
     "@nestjs/common": "^11.0.0",
     "@nestjs/core": "^11.0.0",
@@ -41,6 +41,7 @@
     "better-auth": "^1.5.5",
     "class-transformer": "^0.5.1",
     "class-validator": "^0.15.1",
+    "dotenv": "^17.3.1",
     "fastify": "^5.0.0",
     "node-cron": "^4.2.1",
     "reflect-metadata": "^0.2.0",

apps/gateway/src/main.ts

@@ -1,3 +1,10 @@
+import { config } from 'dotenv';
+import { resolve } from 'node:path';
+
+// Load .env from monorepo root (cwd is apps/gateway when run via pnpm filter)
+config({ path: resolve(process.cwd(), '../../.env') });
+config(); // Also load apps/gateway/.env if present (overrides)
+
 import './tracing.js';
 import 'reflect-metadata';
 import { NestFactory } from '@nestjs/core';

pnpm-lock.yaml

@@ -128,6 +128,9 @@ importers:
       class-validator:
         specifier: ^0.15.1
         version: 0.15.1
+      dotenv:
+        specifier: ^17.3.1
+        version: 17.3.1
       fastify:
         specifier: ^5.0.0
         version: 5.8.2
@@ -3411,6 +3414,10 @@ packages:
     resolution: {integrity: sha512-2l0gsPOLPs5t6GFZfQZKnL1OJNYFcuC/ETWsW4VtKVD/tg4ICa9x+jb9bkPffkMdRpRpuUaO/fKkHCBeiCKh8g==}
     engines: {node: '>=18'}
 
+  dotenv@17.3.1:
+    resolution: {integrity: sha512-IO8C/dzEb6O3F9/twg6ZLXz164a2fhTnEWb95H23Dm4OuN+92NmEAlTrupP9VW6Jm3sO26tQlqyvyi4CsnY9GA==}
+    engines: {node: '>=12'}
+
   drizzle-kit@0.31.9:
     resolution: {integrity: sha512-GViD3IgsXn7trFyBUUHyTFBpH/FsHTxYJ66qdbVggxef4UBPHRYxQaRzYLTuekYnk9i5FIEL9pbBIwMqX/Uwrg==}
     hasBin: true
@@ -8281,6 +8288,8 @@ snapshots:
       - bufferutil
       - utf-8-validate
 
+  dotenv@17.3.1: {}
+
   drizzle-kit@0.31.9:
     dependencies:
       '@drizzle-team/brocli': 0.10.2