fix: utf8 support

Author: Filip Kula

nginx.conf

@@ -4,6 +4,9 @@ http {
     include /etc/nginx/mime.types;
     default_type application/octet-stream;
 
+    charset utf-8;
+    charset_types text/plain text/css application/json application/javascript text/xml application/xml text/javascript;
+
     upstream django {
         server django-web:8000;
     }
@@ -38,6 +41,7 @@ http {
         server_name kola.kia.prz.edu.pl;
 
         charset utf-8;
+        charset_types text/plain text/css application/json application/javascript text/xml application/xml text/javascript;
 
         client_max_body_size 10M;
         client_body_timeout 60s;