Add readme

Author: thenikso

README.md

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+# Serverlessify
+
+A tool to put back the server in Serverless functions!
+
+Do you wanted to deploy your NodeJS AWS Lambda with Serverless but then you thought:
+
+> Well, I'll just start with a monolith and broke it up in microservices later...
+
+We have got you covered! Use Serverlessify to write a server which serves Serverless
+lambdas as if they were on AWS. Later, actually deploying your lamndas with Serverless
+will just be one command away.
+
+## Usage
+
+- `npm install serverlessify`
+- `const serverlessify = require('serverlessify');`
+- `const sls = serverlessify({ http, authorizers });`
+- `sls({ ... }, { ... })`
+
+## What's supported
+
+- html
+  - cors
+  - authorizer
+
+## Best practices
+
+## Examples