eslint: move copyright template to separate file

.eslintrc.js

@@ -1,21 +1,4 @@
-const copyrightTemplate = `/*
- * Copyright 2020 Spotify AB
- *
- * 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.
- */
-
-`;
-
+const path = require('path')
 const base = require('@spotify-backstage/cli/config/eslint');
 
 module.exports = {
@@ -25,8 +8,7 @@ module.exports = {
     'notice/notice': [
       'error',
       {
-        template: copyrightTemplate,
-        onNonMatchingHeader: 'replace',
+        templateFile: path.resolve(__dirname, "scripts/copyright.js"),
       },
     ],
   },

scripts/copyright.js

@@ -0,0 +1,15 @@
+/*
+ * Copyright <%= YEAR %> Spotify AB
+ *
+ * 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.
+ */