suggest knexfile

Signed-off-by: Fredrik Adelöw <freben@gmail.com>

knexfile.js

@@ -0,0 +1,39 @@
+/*
+ * Copyright 2024 The Backstage Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// To create a new migration in a plugin, run:
+//
+//   yarn workspace <package> knex migrate:make <name_with_underscores>
+//
+// for example:
+//
+//   yarn workspace @backstage/plugin-catalog-backend knex migrate:make add_feature_foo
+//
+// This creates a file similar to
+//
+//   plugins/catalog-backend/migrations/20240206160252_add_feature_foo.js
+
+module.exports = {
+  client: 'better-sqlite3',
+  connection: ':memory:',
+  useNullAsDefault: true,
+  migrations: {
+    // unfortunately this needs to be relative to the TARGET, not this file, and
+    // it just so happens to work to make it go up two steps due to our repo
+    // layout
+    stub: '../../scripts/templates/knex-migration.stub.js',
+  },
+};