Django returns 404 when HTTPS with NGINX - django

Question

I'm deploying a django app on aws and it worked fine when http so I used let's encrypt to enable https. It works fine and I can see my index page but when I try to log in (post request), it returns a 404 error. I have no clue about it.
This is my nginx configuration file:
upstream sample_project_server {
server unix:/home/ubuntu/django_env/run/gunicorn.sock fail_timeout=0;
}
server {
listen 443 ssl;
server_name mydomain.es www.mydomain.es;
ssl_certificate /etc/letsencrypt/live/mydomain.es/fullchain.pem;
ssl_certificate_key /etc/letsencrypt/live/mydomain.es/privkey.pem;
ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
ssl_prefer_server_ciphers on;
ssl_ciphers 'EECDH+AESGCM:EDH+AESGCM:AES256+EECDH:AES256+EDH';
root /var/www/html;
index index.html index.htm;
server_name localhost;
client_max_body_size 4G;
access_log /home/ubuntu/logs/nginx-access.log;
error_log /home/ubuntu/logs/nginx-error.log;
location ~* \.(eot|otf|ttf|woff|woff2)$ {
add_header Access-Control-Allow-Origin *;
}
location /static/ {
alias /home/ubuntu/static/;
}
location /media/ {
alias /home/ubuntu/media/;
}
location / {
proxy_pass http://localhost:3000/;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";
proxy_set_header X-Real-IP $remote_addr;;
proxy_set_header X-Forward-Proto http;
proxy_set_header X-Nginx-Proxy true;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Host $http_host;
proxy_redirect off;
if (!-f $request_filename) {
proxy_pass http://sample_project_server;
break;
}
if ($request_method = 'OPTIONS') {
add_header 'Access-Control-Allow-Origin' '*';
add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
add_header 'Access-Control-Allow-Headers' 'DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range';
add_header 'Access-Control-Max-Age' 1728000;
add_header 'Content-Type' 'text/plain; charset=utf-8';
add_header 'Content-Length' 0;
return 204;
}
if ($request_method = 'POST') {
add_header 'Access-Control-Allow-Origin' '*';
add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
add_header 'Access-Control-Allow-Headers' 'DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range';
add_header 'Access-Control-Expose-Headers' 'Content-Length,Content-Range';
}
if ($request_method = 'GET') {
add_header 'Access-Control-Allow-Origin' '*';
add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
add_header 'Access-Control-Allow-Headers' 'DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range';
add_header 'Access-Control-Expose-Headers' 'Content-Length,Content-Range';
}
}
error_page 500 502 503 504 /500.html;
location = /500.html {
root /home/ubuntu/static/;
}
}
server {
listen 80;
server_name mydomain.es www.mydomain.es;
return 301 https://$host$request_uri;
}
And this is part of my settings file in django:
CORS_ORIGIN_ALLOW_ALL = True
CORS_ALLOW_CREDENTIALS = True
CORS_ORIGIN_WHITELIST = (
'localhost:8080','localhost:8000',
)
CORS_ORIGIN_REGEX_WHITELIST = (
'localhost:8080','localhost:8000',
)
SESSION_COOKIE_SECURE = True
CSRF_COOKIE_SECURE = True
Many thanks!