Add Makefile to facilitate common tasks

[zetxek]

Inspired by https://github.com/wodby/docker4drupal, a similar project but for Drupal, it would be nice to have a Makefile that facilitates some common tasks while developing.

Some of the shortcuts that the Makefile provides (via the referenced file docker.mk) are:

• start
• stop
• help
• open a ssh session
• run drush commands (we could run php bin/magento commands and n98-magerun2 too)

As mentioned in #17, this file could be a good place to have startup/shutdown commands, for example.

[paales]

I like the idea to help developers make things more easy and we should if we can!

If the current nfs sync works (#18) out we'd have the following 'commands' to run:

• start: docker-compose up -d
• stop: docker-compose down
• ssh: See README
• cli: since php is running locally, everything can start locally

Do you think an additional CLI tool would make things more understandable / easier to use? I currently like the idea that is is as bare bones as possible, but I'm open to ideas.

[zetxek]

The nice thing of the Makefile is that it's native also. I'll make a proof of concept, with some ideas.

Something I particularly like in docker environments is using a makefile + .env to customize the image and runtime variables (such as URL of the project, name, mysql passwords...)

[hnsr]

Closing some old issues that don't seem relevant anymore, please re-open if you still encounter this issue.