Found this great composer project: https://github.com/clue/phar-composer
download latest https://github.com/clue/phar-composer/releases/latest
Tag: magento
Magento Gitignore
With the htdocs as rootdirectory.
Planning for a Multi-Website Business on Magento
Rather old (=2013) document about planning a multi-website Business in Magento Enterprise.
But it still is valid!