feat: Adding ability to configure the localhost domain (#708)

Adding dotenv package
Defaulting localhost to 'localhost', but .env file can override that
Added example .env file
Ignoring .env file

Co-authored-by: Kyle Buchanan <kylebuch8@gmail.com>

Author: wesruv

.env.example

@@ -0,0 +1,3 @@
+# .env file is only necessary if you want to access the
+# dev site somewhere other than http://localhost
+LOCALHOST = 'custom.localhost.biz'

.gitignore

@@ -15,6 +15,7 @@ lerna-debug.log
 npm-debug.log*
 
 # Local files
+.env
 *.local.umd.js
 *.local.js