Move meshtastic mqtt project to meshcore usb project

.env.example

@@ -1,32 +1,20 @@
-# Server Configuration
+# Server
 PORT=3000
-NODE_ENV=production
+NODE_ENV=development
+SESSION_SECRET=change-this-to-a-random-secret
 
-# Session Secret (CHANGE THIS!)
-SESSION_SECRET=change-this-to-a-random-secret-string
+# MeshCore USB Serial
+# Windows: COM3, COM4, etc.
+# Linux/Mac: /dev/ttyUSB0, /dev/cu.usbmodem14401, etc.
+SERIAL_PORT=COM3
 
-# MQTT Configuration
-MQTT_BROKER=mqtt://mqtt.meshtastic.org
-MQTT_PORT=1883
-MQTT_USERNAME=meshdev
-MQTT_PASSWORD=large4cats
-MQTT_TOPIC=msh/US/#
-MQTT_PUB_TOPIC="msh/US/2/json/mqtt/"
-
-# Optional: If you have your own MQTT broker
-# MQTT_BROKER=mqtt://your-broker.com
-# MQTT_USERNAME=your-username
-# MQTT_PASSWORD=your-password
-
-# Data Retention (in days)
+# Data retention
 DATA_RETENTION_DAYS=30
-
-# Cron schedule for automatic data purging (default: daily at 2 AM)
 PURGE_CRON_SCHEDULE=0 2 * * *
 
 # Logging
 LOG_LEVEL=info
 
-# Rate Limiting
+# Rate limiting
 RATE_LIMIT_WINDOW_MS=900000
 RATE_LIMIT_MAX_REQUESTS=100