add secret generation script

abra.sh

@@ -19,6 +19,10 @@ migrate() {
 	yarn db:migrate --env=production-ssl-disabled
 }
 
+generate_secret() {
+    abra app secret insert $DOMAIN secret_key v1 $(openssl rand -hex 32)
+}
+
 delete_user_by_id() {
 	if [ -z "$1" ] || [ -z "$2" ]; then
 		echo "Usage: ... delete_user_by_id <userid-to-delete> <userid-to-replace>"