How do I get rid of "web" in URL?
Sounds like you need to move everything up one level...

/opt/bitnami/apache2/cms/ (if you can)
/opt/bitnami/apache2/htdocs/


The web folder can be renamed to htdocs (or anything, really) and it will work normally.

If you can't get above htdocs, you'll want to do it like this...

/opt/bitnami/apache2/htdocs/cms/
/opt/bitnami/apache2/htdocs/index.php
/opt/bitnami/apache2/htdocs/cpresources
/opt/bitnami/apache2/htdocs/.htaccess