Update alpine to rev 57 via SR 1002258
    
    https://build.opensuse.org/request/show/1002258
    by user rmax + dimstar_suse
    - Disable parallel build, fails to produce a result
    
      * bsc#1189316, CVE-2021-38370: The c-client library parses
        information from an IMAP server during non-authenticated state
        which could lead to denial of service.