feat: make more things configurable with env vars

Dockerfile

@@ -1,4 +1,5 @@
 FROM docker.jcg.re/base-caddy
+ENV APPDIR=/phpapp
 RUN apk add --no-cache \
       php7-fpm
 ADD root /

root/etc/Caddyfile

@@ -1,3 +1,4 @@
 :8888 
-root /phpapp
+root <APPDIR>
 fastcgi / /tmp/php-fpm.sock php
+log stdout

root/etc/php7/php-fpm.conf

@@ -1,11 +1,22 @@
 [global]
 daemonize = no
+error_log = /var/log/php7/error.log
 
 [www]
 listen = /tmp/php-fpm.sock
 pm = dynamic
-pm.max_children = 5
+pm.max_children = 15
 pm.start_servers = 2
 pm.min_spare_servers = 1
-pm.max_spare_servers = 3
+pm.max_spare_servers = 6
 chdir = /
+request_terminate_timeout = 0
+env[PATH] = /usr/local/bin:/usr/bin:/bin
+php_admin_value[post_max_size] = <UPLOAD_MAX_SIZE>
+php_admin_value[upload_max_filesize] = <UPLOAD_MAX_SIZE>
+php_admin_value[max_execution_time] = 10800
+php_admin_value[max_input_time] = 3600
+php_admin_value[expose_php] = Off
+php_admin_value[memory_limit] = <MEMORY_LIMIT>
+php_admin_value[session.save_path] = "/tmp/php-session"
+php_admin_value[display_errors] = <DISPLAY_ERRORS>

root/etc/s6.d/caddy/run

@@ -1,2 +1,3 @@
 #!/bin/sh
+sed -i -e "s#<APPDIR>#${APPDIR}#" /etc/Caddyfile
 su-exec ${UID}:${GID} caddy --conf /etc/Caddyfile

root/etc/s6.d/php/run

@@ -1,3 +1,6 @@
 #!/bin/sh
-chown -R ${UID}:${GID} /phpapp /var/log/php7
+sed -i -e "s/<UPLOAD_MAX_SIZE>/$UPLOAD_MAX_SIZE/g" /etc/php7/php-fpm.conf \
+       -e "s/<MEMORY_LIMIT>/$MEMORY_LIMIT/g" /etc/php7/php-fpm.conf \
+       -e "s/<DISPLAY_ERRORS>/$DISPLAY_ERRORS/g" /etc/php7/php-fpm.conf
+chown -R ${UID}:${GID} ${APPDIR} /var/log/php7
 su-exec ${UID}:${GID} php-fpm7