add dev env variables script for windows users (we code too)

Author: rmobis

dev_env.ps1

@@ -0,0 +1,5 @@
+$env:FLASK_ENV='development'
+$env:MONGO_URI='mongodb://root:example@localhost:27017/'
+$env:SENDGRID_API_KEY='192b9bdd22ab9ed4d12e236c78afcb9a393ec15f71bbf5dc987d54727823bcbf'
+$env:SECRET_KEY='192b9bdd22ab9ed4d12e236c78afcb9a393ec15f71bbf5dc987d54727823bcbf'
+$env:SERVER_PORT='8080'