Fix DK3025

Author: arnested

Dockerfile

@@ -12,7 +12,7 @@ RUN apk add --no-cache \
 ARG workdir=/var/www
 WORKDIR "${workdir}"
 
-HEALTHCHECK --interval=10s --start-period=90s CMD netstat -ltn | grep -c ":443"
+HEALTHCHECK --interval=10s --start-period=90s CMD [ "sh", "-c", "netstat -ltn | grep -c :443" ]
 
 ENV EXPIRATION_DAYS=30
 ENV NGINX_DOCUMENT_ROOT=/var/www/web