feat: Multi-database and AWS S3 storage support

.env.example

@@ -33,4 +33,39 @@ PUBLIC_ASSETS_URL=http://localhost:3000/assets
 # LiveKit (voice chat)
 LIVEKIT_WS_URL=
 LIVEKIT_API_KEY=
-LIVEKIT_API_SECRET=
+LIVEKIT_API_SECRET=
+
+# ==============================================
+# DATABASE CONFIGURATION
+# ==============================================
+# Configure your database connection here.
+# 
+# Supported databases:
+# - SQLite (default - no configuration needed)
+# - PostgreSQL via DB_URL
+#
+# If DB_URL is not provided, SQLite will be used automatically.
+
+# Database connection URL - leave empty for SQLite
+# For PostgreSQL, use format: postgres://username:password@host:port/database
+DB_URL=
+DB_SCHEMA=
+
+# ==============================================
+# STORAGE CONFIGURATION
+# ==============================================
+# Configure your file storage system here.
+# 
+# Supported storage types:
+# - Local file system (default - no configuration needed)
+# - S3-compatible storage (AWS S3, CloudFlare R2, DigitalOcean Spaces, etc.)
+#
+# For S3 storage, use STORAGE_URL with format: s3://bucket-name/assets/
+
+# S3 storage URL - leave empty for local file storage
+STORAGE_URL=
+CLOUDFRONT_URL=
+
+# AWS credentials (required when using S3)
+AWS_ACCESS_KEY_ID=
+AWS_SECRET_ACCESS_KEY=