Updates dockerfile

node_modules/gray-matter/lib/parse.js

@@ -0,0 +1,13 @@
+'use strict';
+
+const getEngine = require('./engine');
+const defaults = require('./defaults');
+
+module.exports = function(language, str, options) {
+  const opts = defaults(options);
+  const engine = getEngine(language, opts);
+  if (typeof engine.parse !== 'function') {
+    throw new TypeError('expected "' + language + '.parse" to be a function');
+  }
+  return engine.parse(str, opts);
+};