Steem Pressure #7: Go Fork Yourself. Step by step guide to building and setting up a MIRA powered HF21-ready Steem consensus node.
The date of the next, 21st HardFork, has been set, and it is approaching quickly.
There's plenty of info around the web on how to build a Steem node from scratch.
I also wrote a guide some time ago: Steem Pressure #3: Steem Node 101.