New Dockerfile based on Alpine Linux and Nginx/PHP-FPM

.docker/crontab/kanboard

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+1 0 * * * cd /var/www/kanboard && ./kanboard cronjob >/dev/null 2>&1

.docker/nginx/nginx.conf

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+user nginx;
+worker_processes 1;
+
+events {
+    worker_connections 1024;
+}
+
+http {
+    include       mime.types;
+    default_type  application/octet-stream;
+
+    sendfile           on;
+    tcp_nopush         on;
+    tcp_nodelay        on;
+    keepalive_timeout  65;
+    server_tokens      off;
+    access_log         off;
+    error_log          /dev/stderr;
+
+    server {
+        listen       80;
+        server_name  localhost;
+        index        index.php;
+        root         /var/www/kanboard;
+
+        location / {
+            try_files $uri $uri/ /index.php$is_args$args;
+        }
+
+        location ~ \.php$ {
+            try_files $uri =404;
+            fastcgi_split_path_info ^(.+\.php)(/.+)$;
+            fastcgi_pass unix:/var/run/php-fpm.sock;
+            fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
+            fastcgi_index index.php;
+            include fastcgi_params;
+        }
+
+        location /data {
+            return 404;
+        }
+
+        location ~* ^.+\.(log|sqlite)$ {
+            return 404;
+        }
+
+        location ~ /\.ht {
+            return 404;
+        }
+
+        location ~* ^.+\.(ico|jpg|gif|png|css|js|svg|eot|ttf|woff|woff2|otf)$ {
+            expires 7d;
+            etag on;
+        }
+
+        gzip on;
+        gzip_comp_level 3;
+        gzip_disable "msie6";
+        gzip_vary on;
+        gzip_types
+            text/javascript
+            application/javascript
+            application/json
+            text/xml
+            application/xml
+            application/rss+xml
+            text/css
+            text/plain;
+    }
+}

.docker/php/conf.d/local.ini

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+expose_php = Off
+error_reporting = E_ALL
+display_errors = Off
+log_errors = On
+error_log = syslog
+date.timezone = UTC
+allow_url_fopen = On
+post_max_size = 30M
+upload_max_filesize = 30M
+opcache.max_accelerated_files = 7963
+opcache.validate_timestamps = Off
+opcache.save_comments = 0
+opcache.load_comments = 0
+opcache.fast_shutdown = 1
+opcache.enable_file_override = On

.docker/php/php-fpm.conf

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+[global]
+error_log = /dev/stderr
+log_level = error
+daemonize = no
+
+[www]
+user = nginx
+group = nginx
+listen.owner = nginx
+listen.group = nginx
+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

.docker/services.d/.s6-svscan/finish

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+#!/bin/sh
+/bin/true

.docker/services.d/cron/run

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+#!/bin/execlineb -P
+crond -f

.docker/services.d/nginx/run

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+#!/bin/execlineb -P
+nginx -g "daemon off;"

.docker/services.d/php/run

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+#!/bin/execlineb -P
+php-fpm -F