improve .env instructions

Author: jshawl

advanced-integration/.env

@@ -0,0 +1,5 @@
+# Create an application to obtain credentials at
+# https://developer.paypal.com/dashboard/applications/sandbox
+
+CLIENT_ID="YOUR_CLIENT_ID_GOES_HERE"
+APP_SECRET="YOUR_SECRET_GOES_HERE"

advanced-integration/.env.example

@@ -0,0 +1 @@
+.env

advanced-integration/.gitignore

@@ -2,7 +2,7 @@
 
 ## Instructions
 
-1. Add `CLIENT_ID` and `APP_SECRET` to the `.env` file
+1. Rename `.env.example` to `.env` and update `CLIENT_ID` and `APP_SECRET`.
 2. Run `npm install`
 3. Run `npm start`
 4. Open http://localhost:8888

advanced-integration/README.md

@@ -0,0 +1,5 @@
+# Create an application to obtain credentials at
+# https://developer.paypal.com/dashboard/applications/sandbox
+
+CLIENT_ID="YOUR_CLIENT_ID_GOES_HERE"
+APP_SECRET="YOUR_SECRET_GOES_HERE"

standard-integration/.env

@@ -0,0 +1 @@
+.env

standard-integration/.env.example

@@ -5,7 +5,7 @@ This folder contains example code for a standard PayPal integration using both t
 ## Instructions
 
 1. Replace `test` in `public/index.html` with your app's client-id
-2. Add `CLIENT_ID` and `APP_SECRET` to the `.env` file
+2. Rename `.env.example` to `.env` and update `CLIENT_ID` and `APP_SECRET`.
 3. Run `npm install`
 4. Run `npm start`
 5. Open http://localhost:8888