Fixes Docker setup

Added docker-compose.yml, which was ignored in .gitignore
until now. Reorganized related files.

.gitignore

@@ -2,7 +2,6 @@
 .php_cs.cache
 .phpunit.result.cache
 composer.lock
-docker/docker-compose.yml
 plugins/*
 triggers/*
 tests/coverage/*

docker/Dockerfile

@@ -10,7 +10,7 @@ RUN curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/local
 
 # add custom PHP.ini settings
 RUN mv "$PHP_INI_DIR/php.ini-development" "$PHP_INI_DIR/php.ini"
-COPY ./includes/custom.ini /usr/local/etc/php/conf.d/custom.ini
+COPY ./custom.ini /usr/local/etc/php/conf.d/custom.ini
 
 WORKDIR /var/www/html/
 

docker/docker-compose.yml

@@ -0,0 +1,46 @@
+version: '3'
+
+services:
+    arc2:
+        build:
+            context: .
+            dockerfile: Dockerfile
+        container_name: arc2
+        volumes:
+            - ./../:/var/www/html/
+        depends_on:
+            - db
+        links:
+          - db:mysql
+
+    db:
+        image: mariadb:10.3.29
+        container_name: db
+        environment:
+            MYSQL_DATABASE: arc2
+            MYSQL_ROOT_PASSWORD: Pass123
+        volumes:
+            # server is empty at the start because it uses RAM to store data
+            - data:/var/cache
+            - data:/var/lib/mysql
+            # for SQL commands to be run after the server starts
+            - ./sql:/docker-entrypoint-initdb.d
+
+    phpmyadmin:
+        image: phpmyadmin/phpmyadmin
+        container_name: phpmyadmin
+        links:
+            - db:mysql
+        ports:
+            - 8002:80
+        environment:
+            MYSQL_USERNAME: root
+            MYSQL_ROOT_PASSWORD: Pass123
+            PMA_HOST: mysql
+            UPLOAD_LIMIT: 2G
+
+volumes:
+    data:
+        driver_opts:
+            type: tmpfs
+            device: tmpfs