Compression algorithm to use for image layers.
@type t() :: :Gzip | :Zstd | :EStarGZ | :Uncompressed | :GZIP | :ZSTD | :ESTARGZ | :UNCOMPRESSED
@spec e_star_gz() :: :EStarGZ
@spec estargz() :: :ESTARGZ
@spec gzip() :: :Gzip
@spec uncompressed() :: :Uncompressed
@spec zstd() :: :Zstd