RAILS_ENV=development

AWS_ACCESS_KEY_ID
AWS_SECRET_ACCESS_KEY
BUNDLE_GEMFILE
SMTP_DOMAIN
SMTP_PASSWORD
SMTP_PORT
SMTP_SERVER
SMTP_USERNAME
SSO_KEY

## find the ENV currently in use in the app using : 
##   grep -rIso -P "(?<=ENV)(\.fetch\(|\[).[A-Z_]+.(\)|\])" 

# for a uniq ordered list of env vars:
##   grep -rIsoh -P "(?<=ENV)(\.fetch\(|\[).[A-Z_]+.(\)|\])" | grep -oP "[A-Z_]+" | sort -u > temp