ERROR: for kobobe_postgres_1 Cannot start service postgres: error while creating mount source path

Hello, when i try to install kobo, i got this error at the step who the process try to strart database services. below my log.
i have already try install Docker Engine on Ubuntu and Post-installation steps for Linux but i stil get the same error.

i use Ubuntu 20.04.4 LTS (GNU/Linux 5.15.0-1017-azure x86_64)


Removing network kobomaintenance_kobo-maintenance-network
WARNING: Network kobomaintenance_kobo-maintenance-network not found.
Network kobofe_kobo-fe-network is external, skipping
Network kobobe_kobo-be-network is external, skipping
Removing network kobofe_kobo-fe-network
WARNING: Network kobofe_kobo-fe-network not found.
Removing kobobe_redis_cache_1 … done
Removing kobobe_postgres_1 … done
Removing kobobe_mongo_1 … done
Removing kobobe_redis_main_1 … done
Removing network kobobe_kobo-be-network
Launching environment
Creating network “kobobe_kobo-be-network” with driver “bridge”
Creating kobobe_redis_cache_1 …
Creating kobobe_postgres_1 … error
Creating kobobe_redis_main_1 …
Creating kobobe_redis_cache_1 … error

ERROR: for kobobe_postgres_1 Cannot start service postgres: error while creating mount source path ‘/var/www/kobo-install/kobo/postgres’: mkdir /var/www: read-only file system

ERROR: for kobobe_redis_cache_1 Cannot start service redis_cache: error while creating mount source path '/var/www/kobo
Creating kobobe_mongo_1 … error

Creating kobobe_redis_main_1 … error
o/.vols/mongo’: mkdir /var/www: read-only file system

ERROR: for kobobe_redis_main_1 Cannot start service redis_main: error while creating mount source path ‘/var/www/kobo-install/kobo/log/redis_main’: mkdir /var/www: read-only file system

ERROR: for postgres Cannot start service postgres: error while creating mount source path ‘/var/www/kobo-install/kobo/postgres’: mkdir /var/www: read-only file system

ERROR: for redis_cache Cannot start service redis_cache: error while creating mount source path ‘/var/www/kobo-install/kobo/log/redis_cache’: mkdir /var/www: read-only file system

ERROR: for mongo Cannot start service mongo: error while creating mount source path ‘/var/www/kobo-install/kobo/.vols/mongo’: mkdir /var/www: read-only file system

ERROR: for redis_main Cannot start service redis_main: error while creating mount source path ‘/var/www/kobo-install/kobo/log/redis_main’: mkdir /var/www: read-only file system
ERROR: Encountered errors while bringing up the project.
An error has occurred

Hello, i’ts me agin , i was using ans small VM from Microsoft Azure that disk space whas 30G. i thank tha that is why Docker volume mounts faied. … to confirm.
Afeter that i change the VM for an other that has 170G of disk space and all are work fine