how to build?

[IamEden94]

PS C:\Users\user\Desktop\headtracker-master> .\generateHtmlArray.sh
PS C:\Users\user\Desktop\headtracker-master> platformio run --target upload -e wemos
platformio : The term 'platformio' is not recognized as the name of a cmdlet, function, script file, or operable
program. Check the spelling of the name, or if a path was included, verify that the path is correct and try again.
At line:1 char:1

• platformio run --target upload -e wemos

•   + CategoryInfo          : ObjectNotFound: (platformio:String) [], CommandNotFoundException
    + FullyQualifiedErrorId : CommandNotFoundException
  
  

PS C:\Users\user\Desktop\headtracker-master>
PS C:\Users\user\Desktop\headtracker-master> platformio run --target upload -e wemos
platformio : The term 'platformio' is not recognized as the name of a cmdlet, function, script file, or operable
program. Check the spelling of the name, or if a path was included, verify that the path is correct and try again.
At line:1 char:1

• platformio run --target upload -e wemos

•   + CategoryInfo          : ObjectNotFound: (platformio:String) [], CommandNotFoundException
    + FullyQualifiedErrorId : CommandNotFoundException