diff --git a/apps/edr-gps-tracker/.env.example b/apps/edr-gps-tracker/.env.example
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+++ b/apps/edr-gps-tracker/.env.example
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+# GT06 GPS tracker TCP listener (raw TCP, must be reachable by tracker SIMs). 0 disables.
+GT06_TCP_PORT=5023
+GT06_TCP_HOST=0.0.0.0
+
+# Shared freight database (same DB as @edr/freight-api). This app only writes
+# freight.gps_devices / freight.gps_positions and NEVER runs migrations.
+DB_HOST=localhost
+DB_PORT=5433
+DB_NAME=edr_freight
+DB_USER=postgres
+DB_PASSWORD=postgres
+# TYPEORM_LOGGING=true   # uncomment for SQL logging