[Proxmox-Server]
UID root:    0
GID users: 100

mkdir /mnt/bindmounts/shares
chown 100988:100100 /mnt/bindmounts/shares -R
pct set 100 -mp0 /mnt/bindmounts/shares,mp=/var/www/html
pct set 101 -mp0 /mnt/bindmounts/shares,mp=/shares

[Apache-Container]
UID www-data:  33
UID users:    100

groups www-data
usermod -a -G users www-data

[Samba-Container]
UID samba: 988
GID users: 100