Migrate to containerd v1.6.4

Changelog for 0.16.1:

• PR #274 Migrate to containerd v1.6.4 by @alexellis
• PR #273 Add README.md for docs by @welteki
• PR #272 Track community terraform modules for faasd by @welteki
• PR #271 Update auth plugin and gateway by @welteki
• PR #266 Fix issue #265 with Terraform installation by @alexellis

Commits
02e9b99 Migrate to containerd v1.6.4 by @alexellis
fee46de Add README for docs folder by @welteki
6d297a9 Track community terraform modules for faasd by @welteki
2178d90 Update auth plugin and gateway by @welteki
37c63a8 Fix installation of Caddy on armhf and ARM64 by @alexellis
b43d256 Fix issue #265 by @alexellis

Changes: 0.16.0...0.16.1

Generated by Derek