Add cash management schema and immediate variance alerts

server/.env.example

@@ -0,0 +1,9 @@
+# Server config (copy to server/.env or set in your shell)
+PORT=4000
+DATABASE_URL=postgres://postgres:postgres@localhost:5432/crm_omt
+JWT_SECRET=change-me-to-a-long-random-string
+JWT_EXPIRES_IN=12h
+CORS_ORIGIN=http://localhost:5173,http://localhost:8080
+
+# Frontend clients on the same LAN can use the host machine's IP automatically.
+# Add fixed origins here if you want to restrict access more tightly.