bin/magento maintenance:enable
composer clear-cache
composer require shootingcentre/core:*
bin/magento setup:upgrade
rm -rf var/di var/generation generated/code && bin/magento setup:di:compile
rm -rf pub/static/* && bin/magento setup:static-content:deploy -f en_US en_CA
bin/magento maintenance:disable

How to upgrade

bin/magento maintenance:enable
composer clear-cache
composer update shootingcentre/core
bin/magento setup:upgrade
rm -rf var/di var/generation generated/code && bin/magento setup:di:compile
rm -rf pub/static/* && bin/magento setup:static-content:deploy -f en_US en_CA
bin/magento maintenance:disable

If you have problems with these commands, please check the detailed instruction.