Problem: There's no way to define REQUESTS_CA_BUNDLE environment variable

[mamedin]

We have a problem in an AIPscan deployment with one customer that uses a certificate which CA is not added in linux default certificates.

The CA was added following: https://www.archivematica.org/es/docs/archivematica-1.13/admin-manual/security/security/#trusting-additional-cas

But AIPscan was not trusting the certificate.

As workaround I added the environment variable to the AIPscan and celery systemd files:

[Service]
# Client Env Vars
Environment=REQUESTS_CA_BUNDLE=/etc/ssl/certs/ca-certificates.crt

But probably it is better to configure the systemd file to read from a /etc/default/AIPscan file the environment variables to be used or other alternative way.