I want to use phpstorm on my local machine to work via sftp on the vps (changing files in the container volume.)

i have a vps. running docker. started e.g. the wordpress:latest on it. Volumes ./html to the container html dir.
The user i used to start the container is not allowed to change files within this dir. Due to the fact it belongs "www-data" now.
How should i use this exactly? I want to use phpstorm on my local machine to work via sftp on the vps (changing files in the container volume.)