bumped down version of docker-compose for compatibility, updated MediaWiki image, moved compose directives structure

docker-compose.yml

@@ -1,4 +1,4 @@
-version: "3.7"
+version: "3.5"
 
 services:
   db:
@@ -13,20 +13,19 @@ services:
       - MYSQL_USER=mdwiki
       - MYSQL_PASSWORD=${MYSQL_MEDIAWIKI_PASSWORD}
     expose:
-      - "3306"
-
+      - 3306
   wiki:
     container_name: mediawiki_webserver
-    image: mediawiki:1.34.0
+    image: mediawiki:1.34.1
     restart: always
-    depends_on:
-      - db
     volumes:
       - ./data/mediawiki/images:/var/www/html/images
       - ./data/mediawiki/config/LocalSettings.php:/var/www/html/LocalSettings.php
-    links:
-      - db
     expose:
-      - "80"
+      - 80
     ports:
       - "${MEDIAWIKI_HTTP_PORT}:80"
+    links:
+      - db
+    depends_on:
+      - db