runit + php7 dev server + better ctrl-c response Docker

Dockerfile

FROM alpine:3.3

# install packages
RUN echo "@testing http://dl-4.alpinelinux.org/alpine/edge/testing" >> /etc/apk/repositories && \
apk add --update php7-common@testing php7-pdo_mysql@testing \ 
php7-pcntl@testing php7-json@testing php7-opcache@testing \ 
php7-mbstring@testing php7-fpm@testing php7@testing nginx runit@testing

# set up app
RUN mkdir /var/app
COPY index.php /var/app/index.php

# set up runit
RUN mkdir -p /etc/service/php-server && echo '#!/bin/sh' >> /etc/service/php-server/run && echo 'php7 -S 0.0.0.0:80 /var/app/index.php' >> /etc/service/php-server/run && chmod +x /etc/service/php-server/run
COPY runsvinit /sbin/runsvinit
RUN chmod +x /sbin/runsvinit
ENTRYPOINT ["/sbin/runsvinit"]
# ENTRYPOINT ["/sbin/runsvdir", "/etc/service"]
EXPOSE 80

index.php

<?php phpinfo();

runsvinit

#!/bin/sh

sv_stop() {
    for s in $(ls -d /etc/service/*)
    do
        /sbin/sv stop $s
    done
}

trap "sv_stop; exit" SIGTERM
/sbin/runsvdir /etc/service &
wait