feat: Upgrade mariadb and use command instead of copying config file (#597)

docker-compose.yml

@@ -139,12 +139,19 @@ services:
       - redis-socketio-vol:/data
 
   mariadb:
-    image: mariadb:10.3
+    image: mariadb:10.6
     restart: on-failure
+    command:
+      - --character-set-server=utf8mb4
+      - --collation-server=utf8mb4_unicode_ci
+      - --skip-character-set-client-handshake
+      - --skip-innodb-read-only-compressed # Temporary fix for MariaDB 10.6
     environment:
       - MYSQL_ROOT_PASSWORD=${MYSQL_ROOT_PASSWORD}
+      # Sometimes db initialization takes longer than 10 seconds and site-creator goes away.
+      # Frappe doesn't use CONVERT_TZ() function that requires time zone info, so we can just skip it.
+      - MYSQL_INITDB_SKIP_TZINFO=1
     volumes:
-      - ./installation/frappe-mariadb.cnf:/etc/mysql/conf.d/frappe.cnf
       - mariadb-vol:/var/lib/mysql
 
   site-creator: