Write dist/modules.json with module JSON data at the end

src/index.js

@@ -21,6 +21,7 @@ const resetDir = (dir) => {
 };
 
 resetDir(clonesDir);
+
 resetDir(distDir);
 resetDir(modulesDir);
 
@@ -91,4 +92,6 @@ for (const repo of ModuleRepos) {
   if (lastHash !== commitHash) {
     console.log('[Warning] Commit hash in modules does not match latest commit in repo');
   }
-}
+}
+
+writeFileSync(`${distDir}/modules.json`, JSON.stringify(moduleJson));