Add node modules and compiled JavaScript from main (#54)

Co-authored-by: Oliver King <oking3@uncc.edu>

node_modules/openid-client/lib/helpers/is_absolute_url.js

@@ -0,0 +1,12 @@
+const url = require('url');
+const { strict: assert } = require('assert');
+
+module.exports = (target) => {
+  try {
+    const { protocol } = new url.URL(target);
+    assert(protocol.match(/^(https?:)$/));
+    return true;
+  } catch (err) {
+    throw new TypeError('only valid absolute URLs can be requested');
+  }
+};