build(docker): use standalone wget instead of the busybox one, fix #4473

wget in busybox doesn't support redirects (required for downloading
artifacts from GitHub)

Dockerfile

@@ -31,7 +31,9 @@ ARG TARGETPLATFORM
 ARG CROSS_TAGLIB_VERSION=2.1.1-1
 ENV CROSS_TAGLIB_RELEASES_URL=https://github.com/navidrome/cross-taglib/releases/download/v${CROSS_TAGLIB_VERSION}/
 
+# wget in busybox can't follow redirects
 RUN <<EOT
+    apk add --no-cache wget
     PLATFORM=$(echo ${TARGETPLATFORM} | tr '/' '-')
     FILE=taglib-${PLATFORM}.tar.gz