Create developer environment file
ADD
examples/README.md
+# Basic Nodejs example
+
+## How to use
+
+
+### SET ENV Variables
+```
+export PRIVATE_KEY=<paste your private key here> // A sample private key prefix with `0x`
+export FROM=<paste address belonging to private key here> // Your address
+```
+
+Be careful with your private key, Use a key your are comfortable with for development purpose.
+
+### Install and run:
+
+```bash
+cd examples
+npm run build
+node balance-of-ERC20.js

Create developer environment file