get busybox docker working

Author: jhheider

docker/Dockerfile.busybox

@@ -4,7 +4,7 @@ RUN install -m 755 /pkgx/$(uname -m) /usr/local/bin/pkgx
 RUN install -m 755 /pkgx/pkgm /usr/local/bin/pkgm
 
 # FIXME a newer glibc would be nice, but the libpthread.so we copy in then fails
-FROM busybox:1.31-glibc AS stage1
+FROM busybox:1.37-glibc AS stage1
 COPY --from=stage0 /usr/local/bin/pkgx /usr/local/bin/pkgm /usr/local/bin/
 
 # pkgx packages also need libgcc