static-misc: don't log the /ok.txt health checks

Dockerfile

@@ -8,6 +8,9 @@ RUN mkdir /run/apache2; chown apache /run/apache2
 RUN ln -s /dev/stderr /var/log/apache2/error.log
 RUN ln -s /dev/stdout /var/log/apache2/access.log
 
+# allow configurations to mark requests as "don't log"
+RUN perl -i -pe 's{^(CustomLog logs/access.log)$}{$1 combined env=!dontlog};' /etc/apache2/httpd.conf
 RUN echo "IncludeOptional /web/config/*.conf" >> /etc/apache2/httpd.conf
+
 ADD run-httpd /run.sh
 CMD /run.sh