Add README

Signed-off-by: kfei <kfei@kfei.net>

README.md

@@ -0,0 +1,38 @@
+# vue-s3-dropzone
+
+> Vue 2.0 dropzone component uploads files to AWS S3 serverlessly.
+
+## Overview
+
+  - A Vue.js 2.0 component wrapping [Dropzone.js](https://github.com/enyo/dropzone)
+  - Upload files to AWS S3 *serverlessly* with AWS Lambda.
+
+## Demo
+
+![demo-gif](https://i.giphy.com/3oriNVluNp8DmKgvFS.gif)
+
+## Quickstart
+
+Clone this repo:
+
+```
+git clone https://github.com/kfei/vue-s3-dropzone
+```
+
+This repo contains two directories: **frontend** and **lambda**. You must first
+create the AWS Lambda function and deploy it onto AWS API Gateway. Then put the
+invoke URL into `frontend/src/config.js` so that you can run and test the Vue
+powered web client by:
+
+```
+cd frontend
+yarn install
+npm run dev
+```
+
+Please make sure you have correct priviledge/policy/CORS settings on AWS. Feel
+free to open an issue if you happened to be trapped by that. :cry:
+
+## License
+
+MIT

lambda/README.md

@@ -1,5 +1,16 @@
-#### References
+## Quickstart
 
-  - http://stackoverflow.com/q/21452756
-  - https://github.com/danialfarid/ng-file-upload/issues/743
-  - https://github.com/Sam-Martin/aws-image-upload-without-ec2
+  1. create a blank AWS Lambda function
+  2. choose Node 4.3 runtime
+  3. paste the code in `GetSignedURL.js` to the Lambda function code
+  4. add an env variable `AWS_BUCKET_NAME` with value equals to your S3 bucket
+     name
+  5. create an API on AWS API Gateway to trigger the Lambda function
+  6. deploy the API
+  7. done
+
+## Hints
+  - the role of the Lambda function should have the correct permission on your
+    S3 bucket
+  - you should enable CORS and have a correct setting both in API Gateway and
+    S3 bucket