And you see no option for installing from local folder:
root@yolo:/# yunohost app install --help
usage: yunohost app install app [-h] [-l LABEL] [-a ARGS] [-n] [-f] [-i]
Install apps
positional arguments:
app Name, local path or git URL of the app to install
options:
-h, --help show this help message and exit
-l LABEL, --label LABEL
Custom name for the app
-a ARGS, --args ARGS Serialized arguments for app script (i.e. "domain=domain.tld&path=/path&init_main_permission=visitors")
-n, --no-remove-on-failure
Debug option to avoid removing the app on a failed installation
-f, --force Do not ask confirmation if the app is not safe to use (low quality, experimental or 3rd party), or when
the app displays a post-install notification
-i, --ignore-yunohost-version
Attempt to install the app even if your YunoHost version is below the required one