gnu-libiconv don't have /usr/lib/preloadable_libiconv.so
at alpine v3.14 command: apk add gnu-libiconv ls -l /usr/lib/preloadable_libiconv.so
but at alpine v3.13 have it. http://dl-cdn.alpinelinux.org/alpine/v3.14/community/x86_64/gnu-libiconv-1.16-r0.apk http://dl-cdn.alpinelinux.org/alpine/v3.13/community/x86_64/gnu-libiconv-1.15-r3.apk