Updates dockerfile

node_modules/prismjs/components/prism-racket.js

@@ -0,0 +1,18 @@
+Prism.languages.racket = Prism.languages.extend('scheme', {
+	'lambda-parameter': {
+		// the racket lambda syntax is a lot more complex, so we won't even attempt to capture it.
+		// this will just prevent false positives of the `function` pattern
+		pattern: /([(\[]lambda\s+[(\[])[^()\[\]'\s]+/,
+		lookbehind: true
+	}
+});
+
+Prism.languages.insertBefore('racket', 'string', {
+	'lang': {
+		pattern: /^#lang.+/m,
+		greedy: true,
+		alias: 'keyword'
+	}
+});
+
+Prism.languages.rkt = Prism.languages.racket;