Você não definiu nenhuma diretiva de redirecionamento no nginx. Aqui a configuração correta.
#here the redirect section. If server doesn't match www.example.com or example.com, it will redirected to http://www.example.com
server {
listen 80 default_server;
listen [::]:80 default_server ipv6only=on;
server_name _;
return 301 http://www.example.com$request_uri;
}
#your main config files, handles request whenever Host header match www.example.com or example.com
server {
listen 80;
listen [::]:80;
root /usr/share/nginx/html;
index index.html index.htm;
client_max_body_size 4G;
server_name www.example.com;
keepalive_timeout 5;
# Your Django project's media files - amend as required
location /media {
alias /home/django/django_project/django_project/media;
}
# your Django project's static files - amend as required
location /static {
alias /home/django/django_project/django_project/static;
}
location / {
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Host $http_host;
proxy_redirect off;
proxy_pass http://app_server;
}
}