docker: switch to Alpine Linux for the master image

Relates to https://github.com/shaarli/Shaarli/issues/843

Changed:
- switch base image from Debian:Jessie to Alpine:3.6
- switch to PHP 7.1
- switch from supervisord to s6 to manage services

See:
- https://alpinelinux.org/
- https://wiki.alpinelinux.org/wiki/Nginx_with_PHP
- http://www.skarnet.org/software/s6/
  - http://www.skarnet.org/software/s6/s6-svscan.html
  - http://www.skarnet.org/software/s6/s6-svc.html
  - http://www.skarnet.org/software/s6/s6-svstat.html

Signed-off-by: VirtualTam <virtualtam@flibidi.net>

1 files changed, 13 insertions, 0 deletions

diff --git a/docker/stable/supervised.conf b/docker/stable/supervised.conf
new file mode 100644
index 00000000..5acd9795
--- /dev/null
+++ b/docker/stable/supervised.conf
@@ -0,0 +1,13 @@
+[program:php5-fpm]
+command=/usr/sbin/php5-fpm -F
+priority=5
+autostart=true
+autorestart=true
+
+[program:nginx]
+command=/usr/sbin/nginx
+priority=10
+autostart=true
+autorestart=true
+stdout_events_enabled=true
+stderr_events_enabled=true