Hello @alexu,
You could install Moodle module on top of your current installation.
sudo wget https://bitnami.com/redirect/to/1306793/bitnami-moodle-3.10.1-0-module-linux-x64-installer.run
chmod +x bitnami-moodle-3.10.1-0-module-linux-x64-installer.run
sudo ./bitnami-moodle-3.10.1-0-module-linux-x64-installer.run --prefix /opt/bitnami
Regards