You first need to ensure that your inside and outside interfaces are specified in NAT configuration by using the “ip nat inside” and “ip nat outside” statements on the relevant interfaces.
Once you have done that then all you need to do is configure the following:
ip nat inside source static tcp 192.168.0.124 80 87.32.xxx.xxx 80
This may be complicated slightly if you already have other NAT configuration on your CPE. You may also need to take into account the VPN configuration but without a full configuration I can’t say for sure.