Merge cron and redis example

.examples/docker-compose/insecure/mariadb-cron-redis/apache/app/Dockerfile

@@ -0,0 +1,5 @@
+FROM nextcloud:apache
+
+COPY autoconfig.php /usr/src/nextcloud/config/autoconfig.php
+
+COPY redis.config.php /usr/src/nextcloud/config/redis.config.php

.examples/docker-compose/insecure/mariadb-cron-redis/apache/app/autoconfig.php

@@ -0,0 +1,10 @@
+<?php
+$AUTOCONFIG = array(
+  'directory'     => '/var/www/html/data',
+  'dbtype'        => 'mysql',
+  'dbname'        => getenv('MYSQL_DATABASE'),
+  'dbuser'        => getenv('MYSQL_USER'),
+  'dbpass'        => getenv('MYSQL_PASSWORD'),
+  'dbhost'        => 'db',
+  'dbtableprefix' => '',
+);

.examples/docker-compose/insecure/mariadb-cron-redis/apache/app/redis.config.php

@@ -0,0 +1,8 @@
+<?php
+$CONFIG = array (
+  'memcache.locking' => '\OC\Memcache\Redis',
+  'redis' => array(
+    'host' => 'redis',
+    'port' => 6379,
+  ),
+);

.examples/docker-compose/insecure/mariadb-cron-redis/apache/db.env

@@ -0,0 +1,3 @@
+MYSQL_PASSWORD=
+MYSQL_DATABASE=nextcloud
+MYSQL_USER=nextcloud

.examples/docker-compose/insecure/mariadb-cron-redis/apache/docker-compose.yml

@@ -0,0 +1,57 @@
+version: '3'
+
+services:
+  db:
+    image: mariadb
+    # image: mysql
+    restart: always
+    volumes:
+      - db:/var/lib/mysql
+    environment:
+      - MYSQL_ROOT_PASSWORD=
+    env_file:
+      - db.env
+
+  redis:
+    image: redis
+    restart: always
+
+  app:  
+    build: ./app
+    restart: always
+    ports:
+      - 8080:80
+    volumes:
+      - nextcloud:/var/www/html
+    env_file:
+      - db.env
+    links:
+      - db
+      - redis
+
+  cron:
+    build: ./app
+    restart: always
+    volumes:
+      - nextcloud:/var/www/html
+    links:
+      - db
+      - redis
+    user: www-data
+    entrypoint: |
+      bash -c 'bash -s <<EOF
+        trap "break;exit" SIGHUP SIGINT SIGTERM
+
+        while [ ! -f /var/www/html/config/config.php ]; do
+          sleep 1
+        done
+
+        while true; do
+          php -f /var/www/html/cron.php
+          sleep 15m
+        done
+      EOF'
+
+volumes:
+  db:
+  nextcloud: