Add missing markdown index. Modify gitignore. No idea how it got to t…

…his state ¯\_(ツ)_/¯

packages/api-explorer/.gitignore

@@ -1,4 +1,4 @@
 node_modules
 coverage
-index.js
+dist/index.js
 .DS_Store

packages/api-explorer/src/lib/markdown/index.js

@@ -0,0 +1,36 @@
+const marked = require('marked');
+const Emoji = require('./emojis.js').emoji;
+const syntaxHighlighter = require('@readme/syntax-highlighter');
+const sanitizer = require('./sanitizer');
+const renderer = require('./renderer');
+
+const emojis = new Emoji();
+
+module.exports = function markdown(text, opts = {}) {
+  marked.setOptions({
+    sanitize: true,
+    preserveNumbering: true,
+    renderer,
+    emoji(emojiText) {
+      const emoji = emojiText.replace(/[^-_+a-zA-Z0-9]/g, '').toLowerCase();
+      if (emoji.substr(0, 3) === 'fa-') {
+        return `<i class="fa ${emoji}"></i>`;
+      }
+      if (emojis.is(emoji)) {
+        return `<img src="/img/emojis/${emoji}.png" alt=":${emoji}+:" title=":${emoji}:" class="emoji" align="absmiddle" height="20" width="20">`;
+      }
+      return `:${emoji}:`;
+    },
+    highlight(code, language) {
+      if (!language) return undefined;
+      return syntaxHighlighter(code, language);
+    },
+    gfm: true,
+    breaks: !opts.correctnewlines,
+    // By default we don't wanna strip any tags
+    // so we use our sanitizer and not the built in
+    // which just calls `escape()`
+    sanitizer: opts.stripHtml ? undefined : sanitizer,
+  });
+  return marked(text);
+};