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chore(www): migrate root .well-known/ to www/.well-known/ (#66) #172

Job	Run time
rust-ci / Detect Cargo.toml	5s
rust-ci / Cargo audit (security)	45m 15s
rust-ci / Cargo check + clippy + fmt	45m 15s
rust-ci / llvm-cov line coverage	0s
rust-ci / Cargo test	1s
	1h 30m 36s