add node test

Author: samerbuna

1-getting-started/3-process/1-custom-env-variables.js

@@ -2,5 +2,5 @@ console.log('Current user is', process.env.USER);
 
 console.log('\nScript executed with:');
 
-console.log('VAL1 equalt to:', process.env.VAL1);
-console.log('VAL2 equalt to:', process.env.VAL2);
+console.log('VAL1 equal to:', process.env.VAL1);
+console.log('VAL2 equal to:', process.env.VAL2);

1-getting-started/node-test.js

@@ -0,0 +1,6 @@
+// Modern JS test
+(async (a = 1, ...b) => ({...b, a, [a]: `${a}`}))();
+
+// New Promise APIs
+require('util').promisify;
+require('fs').promises;