docs: state access log duration is in milliseconds
docs: use v0.2.0 in version examples
docs: describe the upload .tmp directory
docs: note the sweep skips uploads in progress
docs: use ANCHOR_LFS_CONFIG for Docker config paths
docs: describe the Prometheus metrics endpoint
docs: describe release downloads and verification
docs: describe shutdown exit codes and the second signal
docs: document --config, check and startup log lines
docs: correct status codes, layout, env vars and commands
docs: add shutdown_timeout, stop grace periods and temp sweep
docs: document /ready, healthcheck and S3 startup checks
docs: document log_format, log_level and access_log
hello world