Update
I use a config.yaml file and now, the relstorage options with the database connection options are in the zope.conf available:
cookiecutter -f --no-input --config-file config.yaml https://github.com/plone/cookiecutter-zope-instance
default_context:
initial_user_name: "admin"
initial_user_password: "admin"
target: "./instance"
load_zcml:
package_includes: []
db_storage: relstorage
db_relstorage: mysql
db_blobs_mode: "cache"
db_relstorage_keep_history: false
db_relstorage_mysql_parameters:
host: localhost
user: zodbuser
passwd: secret
db: zodb
debug_mode: true
Amazing!