fix: copy SQL migrations to dist/ in Dockerfile

backend/src/migrations/001_init.sql

@@ -140,15 +140,15 @@ BEGIN
 END;
 $$ LANGUAGE plpgsql;
 
-CREATE TRIGGER set_updated_at_users
+CREATE OR REPLACE TRIGGER set_updated_at_users
   BEFORE UPDATE ON users
   FOR EACH ROW EXECUTE FUNCTION trigger_set_updated_at();
 
-CREATE TRIGGER set_updated_at_companies
+CREATE OR REPLACE TRIGGER set_updated_at_companies
   BEFORE UPDATE ON companies
   FOR EACH ROW EXECUTE FUNCTION trigger_set_updated_at();
 
-CREATE TRIGGER set_updated_at_invoices
+CREATE OR REPLACE TRIGGER set_updated_at_invoices
   BEFORE UPDATE ON invoices
   FOR EACH ROW EXECUTE FUNCTION trigger_set_updated_at();