Go to the ionic project directory where you should create the ionic project. ionic start projectname
Go to this projectname directory through this command cd projectname.
After type this command ionic serve .
i am sending the project folder with all changes just you have to do this open the project folder in terminal and insatll with this command npm install https://we.tl/t-zXhgimBjNu Because in your project directory lots of dependencies will be missing that’s why the ionic serve is not working on your setup.
so please download with this link and i am updating all the ionic dependencies.