doc: add initial README

Author: RafaelGSS

README.md

@@ -1 +1,20 @@
 # nodejs-package-benchmark
+
+This package allows you to benchmark different runtimes using popular
+packages operations.
+
+## Supported packages
+
+- [x] fastify
+- [x] lodash
+- [ ] prettier
+- [ ] webpack
+- [ ] babel
+- [ ] moment
+- [ ] dotenv
+- [ ] pinojs
+- [ ] winston
+- [ ] helmet
+- [ ] node-sass
+- [ ] underscore
+- [ ] minify