+= Dockerfile and updated README.md #300

Job	Run time
nix-build-book	27s
nix-build (fuel, ubuntu-latest)	43s
nix-fmt-check	19s
nix-build (fuel, macos-latest)	3m 8s
nix-build (fuel, macos-arm)	26s
nix-build (fuel-beta-3, ubuntu-latest)	35s
nix-build (fuel-beta-3, macos-latest)	2m 45s
nix-build (fuel-beta-3, macos-arm)	16s
nix-build (fuel-beta-4, ubuntu-latest)	32s
nix-build (fuel-beta-4, macos-latest)	1m 47s
nix-build (fuel-beta-4, macos-arm)	16s
nix-build (fuel-nightly, ubuntu-latest)	37s
nix-build (fuel-nightly, macos-latest)	2m 36s
nix-build (fuel-nightly, macos-arm)	18s
nix-build (sway-vim, ubuntu-latest)	20s
nix-build (sway-vim, macos-latest)	1m 19s
nix-build (sway-vim, macos-arm)	15s
nix-develop (ubuntu-latest)	1m 18s
nix-develop (macos-latest)	3m 23s
nix-develop (macos-arm)	17s
	21m 37s

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