decaffeinate: rename app/coffee dir to app/js

app/js/ContentTypeMapper.js

@@ -0,0 +1,33 @@
+/* eslint-disable
+    no-unused-vars,
+*/
+// TODO: This file was created by bulk-decaffeinate.
+// Fix any style issues and re-enable lint.
+let ContentTypeMapper;
+const Path = require('path');
+
+// here we coerce html, css and js to text/plain,
+// otherwise choose correct mime type based on file extension,
+// falling back to octet-stream
+module.exports = (ContentTypeMapper = {
+	map(path) {
+		switch (Path.extname(path)) {
+			case '.txt': case '.html': case '.js': case '.css': case '.svg':
+				return 'text/plain';
+			case '.csv':
+				return 'text/csv';
+			case '.pdf':
+				return 'application/pdf';
+			case '.png':
+				return 'image/png';
+			case '.jpg': case '.jpeg':
+				return 'image/jpeg';
+			case '.tiff':
+				return 'image/tiff';
+			case '.gif':
+				return 'image/gif';
+			default:
+				return 'application/octet-stream';
+		}
+	}
+});