feat(.env): Add .env_sample and update readme

Rod Xavier Bondoc · Rod Xavier Bondoc · commit a7d23686f4ef · 2017-10-27T11:15:11.000+11:00
diff --git a/.env_sample b/.env_sample
@@ -0,0 +1 @@
+export SENDGRID_API_KEY=''
diff --git a/README.md b/README.md
@@ -44,6 +44,16 @@ or
 easy_install python_http_client
 ```
 
+## API Key
+
+Store your SendGrid API key in a .env file
+
+```bash
+cp .env_sample .env
+```
+
+Edit the `.env` file and add your API key.
+
 <a name="quick-start"></a>
 # Quick Start
 
