DOT nie jest uznawane za polecenie wewnętrzne lub zewnętrzne

npm config set script-shell "C:\\Program Files (x86)\\git\\bin\\bash.exe"

or (64bit installation)

npm config set script-shell "C:\\Program Files\\git\\bin\\bash.exe"

Note that you need to have git bash for windows installed.

You can revert it by running:
Alexandre Dao