use latest frolvlad/alpine-glibc

docker/Dockerfile

@@ -1,4 +1,4 @@
-FROM frolvlad/alpine-glibc:alpine-3.5
+FROM frolvlad/alpine-glibc
 
 # Tried to use curl only (curl -o /tmp/linux_amd64.tar.gz ...), however it turned out that the following tar command failed with "gzip: stdin: not in gzip format"
 RUN apk add --no-cache --virtual build-dependencies --update wget curl ca-certificates && \