Add .env files and data folders to gitignore

.gitignore

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+*.env
+nextcloud/
+mysql/

docker-compose.yml

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+version: '3.7'
+
+services:
+  mariadb:
+    image: mariadb
+    restart: always
+    networks:
+      - nextcloud
+    volumes:
+      - ./mysql:/var/lib/mysql
+    environment:
+      MYSQL_DATABASE: 'nextcloud_db'
+      MYSQL_RANDOM_ROOT_PASSWORD: 'true'
+      MYSQL_USER: ${MYSQL_USER}
+      MYSQL_PASSWORD: ${MYSQL_PASSWORD}
+  nextcloud:
+    image: nextcloud
+    depends_on:
+      - mariadb
+    networks:
+      - nextcloud_db_net
+    volumes:
+      - ./nextcloud:/var/www/html
+    environment:
+      MYSQL_HOST: 'mariadb:3306'
+      MYSQL_DATABASE: 'nextcloud_db'
+      MYSQL_USER: ${MYSQL_USER}
+      MYSQL_PASSWORD: ${MYSQL_PASSWORD}
+
+networks:
+  nextcloud_db_net: