some fixes

.env

 ##
 IMAP_PATH=
 IMAP_USERNAME=
-IMAP_STORE_ATTACHMENTS_DIR="%kernel.project_dir%/var/imap/attachments"
+IMAP_STORE_ATTACHMENTS_DIR=var/imap/attachments
 
 ###> doctrine/doctrine-bundle ###
 # Format described at https://www.doctrine-project.org/projects/doctrine-dbal/en/latest/reference/configuration.html#connecting-using-a-url

README.md

+**FinFollowBCS**
+
+do not forget to remove `var/imap/attachments/*.bin` files after
+