fix: enchance utf-8 support

Author: Filip Kula

nginx.conf

@@ -4,6 +4,8 @@ http {
     include /etc/nginx/mime.types;
     default_type application/octet-stream;
 
+    charset utf-8;
+
     upstream django {
         server django-web:8000;
     }
@@ -40,6 +42,8 @@ http {
         ssl_certificate /etc/letsencrypt/live/kola.kia.prz.edu.pl/fullchain.pem;
         ssl_certificate_key /etc/letsencrypt/live/kola.kia.prz.edu.pl/privkey.pem;
 
+        charset utf-8;
+
         location /static/ {
             alias /static/;
         }