Idk, everything i find via web search says this "MarkScan" a company in India, is fraudulent and spam/abuses sites DMCA's etc. Many many posts claiming they impersonate and claim to be representing some big media company and have taken down things not even related to the IP they claim has been violated. There also is news reports that local Police have arrested employees of this company under charges of fraud and harassment and other crimes.
Personally, i think their claim is bogus... however, as things are these days, the innocent person rarely wins in the long term.
matthuisman mentioned he does not want to risk other things tied to his site, legit or fraudulent claims aside, the whole process is just crap and I do not blame him for just wanting to find some other solution and not have to worry about it.
This Docker solution seems to work fine...for now.
just hope those scammy IP Protection company's don't find a way to take that down.