Upgrade glibc again

Dockerfile

@@ -6,6 +6,7 @@ LABEL com.example.vendor="PARAGON Executive Service GmbH" \
       description="An image for GitLab runner to build and test Drupal projects."
 
 ARG compose_version=1.21.2
+ARG glibc_version=2.28-r0
 
 RUN apk update && \
     apk add --no-cache curl openssl openssh ca-certificates wget make \
@@ -15,9 +16,9 @@ RUN apk update && \
         php7-tokenizer php7-simplexml php7-xmlwriter && \
     \
     wget -q https://alpine-pkgs.sgerrand.com/sgerrand.rsa.pub -O /etc/apk/keys/sgerrand.rsa.pub && \
-    wget -q https://github.com/sgerrand/alpine-pkg-glibc/releases/download/2.23-r3/glibc-2.23-r3.apk && \
-    apk add --no-cache glibc-2.23-r3.apk && \
-    rm glibc-2.23-r3.apk && \
+    wget -q https://github.com/sgerrand/alpine-pkg-glibc/releases/download/${glibc_version}/glibc-${glibc_version}.apk && \
+    apk add --no-cache glibc-${glibc_version}.apk && \
+    rm glibc-${glibc_version}.apk && \
     ln -s /lib/libz.so.1 /usr/glibc-compat/lib/ && \
     ln -s /lib/libc.musl-x86_64.so.1 /usr/glibc-compat/lib && \
     ln -s /usr/lib/libgcc_s.so.1 /lib/libgcc_s.so.1 && \