Add deployment docs and fix dotenv loading

- Add deploy/server-info.md with full server access, DB, SSL, nginx info
- Add dotenv dependency for .env file loading on server
- Server running at https://marketplace.173.212.212.157.sslip.io

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

server/src/config/env.ts

@@ -1,3 +1,5 @@
+import 'dotenv/config';
+
 export const env = {
   PORT: parseInt(process.env['PORT'] || '3000', 10),
   DATABASE_URL: process.env['DATABASE_URL'] || 'postgresql://marketplace:marketplace_dev@localhost:5432/marketplace',