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>

7 files changed, 147 insertions, 0 deletions

diff --git a/docker/alpine/Dockerfile.master b/docker/alpine/Dockerfile.master
new file mode 100644
index 00000000..58f7c6e7
--- /dev/null
+++ b/docker/alpine/Dockerfile.master
@@ -0,0 +1,47 @@
+FROM alpine:3.6
+MAINTAINER Shaarli Community
+
+RUN apk --update --no-cache add \
+        ca-certificates \
+        curl \
+        nginx \
+        php7 \
+        php7-ctype \
+        php7-curl \
+        php7-fpm \
+        php7-gd \
+        php7-iconv \
+        php7-intl \
+        php7-json \
+        php7-mbstring \
+        php7-openssl \
+        php7-phar \
+        php7-session \
+        php7-xml \
+        php7-zlib \
+        s6
+
+COPY nginx.conf /etc/nginx/nginx.conf
+COPY php-fpm.conf /etc/php7/php-fpm.conf
+COPY services.d /etc/services.d
+
+RUN curl -sS https://getcomposer.org/installer | php7 -- --install-dir=/usr/local/bin --filename=composer \
+    && rm -rf /etc/php7/php-fpm.d/www.conf \
+    && sed -i 's/post_max_size.*/post_max_size = 10M/' /etc/php7/php.ini \
+    && sed -i 's/upload_max_filesize.*/upload_max_filesize = 10M/' /etc/php7/php.ini
+
+
+WORKDIR /var/www
+RUN curl -L https://github.com/shaarli/Shaarli/archive/master.tar.gz | tar xzf - \
+    && mv Shaarli-master shaarli \
+    && cd shaarli \
+    && composer --prefer-dist --no-dev install \
+    && rm -rf ~/.composer \
+    && chown -R nginx:nginx .
+
+VOLUME /var/www/shaarli/data
+
+EXPOSE 80
+
+ENTRYPOINT ["/bin/s6-svscan", "/etc/services.d"]
+CMD []
diff --git a/docker/alpine/IMAGE.md b/docker/alpine/IMAGE.md
new file mode 100644
index 00000000..6f827b35
--- /dev/null
+++ b/docker/alpine/IMAGE.md
@@ -0,0 +1,5 @@
+## shaarli:latest
+- [Debian 8 Jessie](https://hub.docker.com/_/debian/)
+- [PHP5-FPM](http://php-fpm.org/)
+- [Nginx](http://nginx.org/)
+- [Shaarli](https://github.com/shaarli/Shaarli)
diff --git a/docker/alpine/nginx.conf b/docker/alpine/nginx.conf
new file mode 100644
index 00000000..07fba33f
--- /dev/null
+++ b/docker/alpine/nginx.conf
@@ -0,0 +1,73 @@
+user nginx nginx;
+daemon off;
+worker_processes 4;
+pid /var/run/nginx.pid;
+
+events {
+    worker_connections  768;
+}
+
+http {
+    include            mime.types;
+    default_type       application/octet-stream;
+    keepalive_timeout  20;
+
+    client_max_body_size 10m;
+
+    index index.html index.php;
+
+    server {
+        listen       80;
+        root         /var/www/shaarli;
+
+        access_log  /var/log/nginx/shaarli.access.log;
+        error_log   /var/log/nginx/shaarli.error.log;
+
+        location ~ /\. {
+            # deny access to dotfiles
+            access_log off;
+            log_not_found off;
+            deny all;
+        }
+        
+        location ~ ~$ {
+            # deny access to temp editor files, e.g. "script.php~"
+            access_log off;
+            log_not_found off;
+            deny all;
+        }
+
+        location ~* \.(?:ico|css|js|gif|jpe?g|png)$ {
+            # cache static assets
+            expires    max;
+            add_header Pragma public;
+            add_header Cache-Control "public, must-revalidate, proxy-revalidate";
+        }
+
+        location = /favicon.ico {
+            # serve the Shaarli favicon from its custom location
+            alias /var/www/shaarli/images/favicon.ico;
+        }
+
+        location / {
+            # Slim - rewrite URLs
+            try_files $uri /index.php$is_args$args;
+        }
+
+        location ~ (index)\.php$ {
+            # Slim - split URL path into (script_filename, path_info)
+            try_files $uri =404;
+            fastcgi_split_path_info ^(.+\.php)(/.+)$;
+
+            # filter and proxy PHP requests to PHP-FPM
+            fastcgi_pass   unix:/var/run/php-fpm.sock;
+            fastcgi_index  index.php;
+            include        fastcgi.conf;
+        }
+
+        location ~ \.php$ {
+            # deny access to all other PHP scripts
+            deny all;
+        }
+    }
+}
diff --git a/docker/alpine/php-fpm.conf b/docker/alpine/php-fpm.conf
new file mode 100644
index 00000000..0843c164
--- /dev/null
+++ b/docker/alpine/php-fpm.conf
@@ -0,0 +1,16 @@
+[global]
+daemonize = no
+
+[www]
+user = nginx
+group = nginx
+listen.owner = nginx
+listen.group = nginx
+catch_workers_output = yes
+listen = /var/run/php-fpm.sock
+pm = dynamic
+pm.max_children = 20
+pm.start_servers = 1
+pm.min_spare_servers = 1
+pm.max_spare_servers = 3
+pm.max_requests = 2048
diff --git a/docker/alpine/services.d/.s6-svscan/finish b/docker/alpine/services.d/.s6-svscan/finish
new file mode 100755
index 00000000..1dadeeaf
--- /dev/null
+++ b/docker/alpine/services.d/.s6-svscan/finish
@@ -0,0 +1,2 @@
+#!/bin/sh
+/bin/true
diff --git a/docker/alpine/services.d/nginx/run b/docker/alpine/services.d/nginx/run
new file mode 100755
index 00000000..21e7b0d6
--- /dev/null
+++ b/docker/alpine/services.d/nginx/run
@@ -0,0 +1,2 @@
+#!/bin/execlineb -P
+nginx
diff --git a/docker/alpine/services.d/php-fpm/run b/docker/alpine/services.d/php-fpm/run
new file mode 100755
index 00000000..21dd0107
--- /dev/null
+++ b/docker/alpine/services.d/php-fpm/run
@@ -0,0 +1,2 @@
+#!/bin/execlineb -P
+php-fpm7 -F