[bug] OpenVPN container cron scripts save files in /root instead of /

[Poueck]

Describe the bug
The configuration update script and de CRL download script produce files that are written in the current directoy.
Crond set the current directory to /root, but files should be in /
This implies that new CRL file and new config files don't overwrite the existing one and nothing is applied

Steps To Reproduce
Steps to reproduce the behavior:

1. Start the OpenVPN docker
2. Change the configuration of the OpenVPN server in OpenWISP
3. Wait for configuration script run
4. See that configuration files are in /root directory and configuration files in / are still the originals

Expected behavior
files in / directory should be overwrited

System Informatioon:

• OS: AlmaLinux release 8.10 (Cerulean Leopard)
• Docker version: Docker version 26.1.3, build b72abbb

[Poueck]

To fix the issue, I locally update crontab lines to:

*/1 * * * * cd / && sh /openvpn.sh
0 0 * * * cd / && sh /revokelist.sh

I notice that restarting OpenVPN is not needed after CRL file download. The file seems to be loaded on each new connection to the OpenVPN server.