ionic invoice app with angular

To run the project clone the project and change the directory #run the following command

npm install && ionic serve

1. We can add items in cart. Until all the details are filled the add button will be disabled.
2. If we try to add same item it will show error in toast bar on top.
3. In cart section we can increase or decrease the quantity
4. The total amount gets updated according to the quantity.
5. For navigating to cart section bottom tab bar is used.