+= Dockerfile and updated README.md #303

Job	Run time
nix-fmt-check	23s
nix-build-book	27s
nix-build (fuel, ubuntu-latest)	40s
nix-build (fuel, macos-latest)	2m 30s
nix-build (fuel, macos-arm)	25s
nix-build (fuel-beta-3, ubuntu-latest)	38s
nix-build (fuel-beta-3, macos-latest)	1m 47s
nix-build (fuel-beta-3, macos-arm)	16s
nix-build (fuel-beta-4, ubuntu-latest)	40s
nix-build (fuel-beta-4, macos-latest)	1m 48s
nix-build (fuel-beta-4, macos-arm)	16s
nix-build (fuel-nightly, ubuntu-latest)	38s
nix-build (fuel-nightly, macos-latest)	2m 16s
nix-build (fuel-nightly, macos-arm)	19s
nix-build (sway-vim, ubuntu-latest)	23s
nix-build (sway-vim, macos-latest)	1m 19s
nix-build (sway-vim, macos-arm)	16s
nix-develop (ubuntu-latest)	1m 12s
nix-develop (macos-latest)	3m 49s
nix-develop (macos-arm)	17s
	20m 19s

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