Mircosoft Windows - Creating a directory starting with a dot on windows

 You can create a folder using the Command Prompt with:

Step 1: Press Window + R to open "Run" Command

Step 2: Type cmd in the run window to open command prompt

Step 3: in the Command prompt, Go To Directory in which you wants to create folder, using Cd.. Command

Step 3: Use the Command  mkdir .well-known