Loved your tutorial from when I went through the first edition a few years back. I still recommend this as a starting point for any one new to Rails and just a

Loved your tutorial from when I went through the first edition a few years back. I still recommend this as a starting point for any one new to Rails and just anyone new to web development in general. It's a great comprehensive guide to how things fit together that doesn't make much in the way of assumptions about the reader's prior knowledge. I work full time as a Rails developer and this is pretty much mandatory reading for new developers to our group without previous Rails experience. I would love to see you get some coverage of Docker in there. Heroku is great, but virtualization is just such a big part of web development these days; it would be a great addition to an already wonderful learning resource. Keep up the good work!