add 'firecracker'

- signed-off-by: trimstray <trimstray@gmail.com>

README.md

@@ -621,6 +621,7 @@ performance of any of your sites from across the globe.<br>
 &nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/pi-hole/pi-hole"><b>pi-hole</b></a> - the Pi-hole® is a DNS sinkhole that protects your devices from unwanted content.<br>
 &nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/stamparm/maltrail"><b>maltrail</b></a> - malicious traffic detection system.<br>
 &nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/Netflix/security_monkey"><b>security_monkey</b></a> - monitors AWS, GCP, OpenStack, and GitHub orgs for assets and their changes over time.<br>
+&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/firecracker-microvm/firecracker"><b>firecracker</b></a> - secure and fast microVMs for serverless computing.<br>
 </p>
 
 #### Networks &nbsp;[<sup>[TOC]</sup>](#anger-table-of-contents)