fix(docker): pass AUTH_SECRET not NEXTAUTH_SECRET (NextAuth v5 env var name)

docker-compose.yml

@@ -25,7 +25,7 @@ services:
     environment:
       DATABASE_URL: "postgresql://grow:${POSTGRES_PASSWORD}@db:5432/grow"
       NEXTAUTH_URL: ${NEXTAUTH_URL}
-      NEXTAUTH_SECRET: ${NEXTAUTH_SECRET}
+      AUTH_SECRET: ${AUTH_SECRET}
       SUPERADMIN_EMAIL: ${SUPERADMIN_EMAIL}
       # Optional
       SMTP_HOST: ${SMTP_HOST:-}