Don't cache apk when building l3drun

run/Dockerfile

@@ -14,7 +14,7 @@ ARG glibc_version=2.28-r0
 
 ADD scripts/* /usr/local/bin/
 
-RUN apk add bash curl jq && \
+RUN apk add --no-cache bash curl jq && \
     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/${glibc_version}/glibc-${glibc_version}.apk && \
     apk add --no-cache glibc-${glibc_version}.apk && \