Upgrade to LDAP Account Manager 7.6

Moved away from RPM package upgrade procedure to Docker container.
Took old configuration files and ran:

docker run -d --name bierochs-lam --dns 192.168.1.71 --hostname lam.bierochs.org \
 -e LAM_SKIP_PRECONFIGURE=true \
 -e VIRTUAL_HOST=lam.bierochs.org \
 -e VIRTUAL_PORT=443 \
 -p 8086:80 \
 -v /mnt/docker/lam:/var/lib/ldap-account-manager/config:z \
 registry.bierochs.org/ldapaccountmanager/lam:latest

LAM 7.6 goes cloud native and fully supports PHP 8