add nginx example conf

nextcloud/docker-compose.yml

@@ -0,0 +1,21 @@
+services:
+  db:
+    image: mariadb:10.6
+    restart: always
+    command: --transaction-isolation=READ-COMMITTED --binlog-format=ROW
+    volumes:
+      - ./db:/var/lib/mysql
+    env_file: 
+      - env
+
+  app:
+    image: nextcloud:27
+    restart: always
+    ports:
+      - 50000:80
+    links:
+      - db
+    volumes:
+      - ./nextcloud:/var/www/html
+    env_file: 
+      - env