Creating a website that will match data which is list of names of users in text format in data.txt file

My main objective is to create a website that will match users' data from data.txt file and will allow to users to check themselves that whether their data is included in our database or not. If it matchs then our website should able to inform user that data is included or not Ideally this is the best example https://haveibeenpwned.com/