Is there a way to return the contents of a global environment variable when accessing a file?

Question

linux

The task is this, there is a file system in a Docker container (Alpine) with the --read-only mode
There is the contents of the certificate in the environment variable
The request (python) library requires specifying the path to the file with the certificate, I can’t write to the file because the FS is in read-only mode .
The question is how to create a file or a link in the FS, until the container is launched, when accessed, the contents of the global environment variable are displayed.

Thank you!

Answer 1

https://docs.docker.com/storage/tmpfs/
Mount tmpfs and store variable content to file