Router page
Guides https://docs.cloud.muni.cz/cloud/network/#router-external-gateway-assign and https://docs.cloud.muni.cz/cloud/network/#router-external-gateway-release from old docs weren't included in new one.
Guides https://docs.cloud.muni.cz/cloud/network/#router-external-gateway-assign and https://docs.cloud.muni.cz/cloud/network/#router-external-gateway-release from old docs weren't included in new one.