Add insecure docker-compose examples for apache

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

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+FROM nextcloud:apache
+
+COPY autoconfig.php /usr/src/nextcloud/config/autoconfig.php

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

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+<?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/apache/db.env

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+MYSQL_PASSWORD=
+MYSQL_DATABASE=nextcloud
+MYSQL_USER=nextcloud

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

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+version: '3'
+
+services:
+  db:
+    image: mariadb
+    restart: always
+    volumes:
+      - db:/var/lib/mysql
+    environment:
+      - MYSQL_ROOT_PASSWORD=
+    env_file:
+      - db.env
+
+  app:  
+    build: ./app
+    restart: always
+    ports:
+      - 8080:80
+    volumes:
+      - nextcloud:/var/www/html
+    env_file:
+      - db.env
+    links:
+      - db
+
+volumes:
+  db:
+  nextcloud: