Update node17 template (and prior, if you have time) to use chown from Docker

[alexellis]

Update node17 template (and prior, if you have time) to use chown from Docker

Expected Behaviour

Where possible, when copying files between stages or from the build context, use Docker's own chown command.

Current Behaviour

Not used

Steps to Reproduce (for bugs)

1. Create a new function and install something big and slow like the AWS SDK
2. Try faas-cli build and see how it goes?
3. After, I hope it should be quicker

Example of a large function to build

https://github.com/alexellis/gumroad-custom-workflow