bug in nginx config with django in aws

So, I'm learning django using the book "TDD with Python" and in the chapter I am, we have to deploy an app to the live internet.

I have an instance up and running (ubuntu) in amazon web services. It has its own elastic IP already. I log into it using ssh from bash.

I installed a VE in the server and another directory containing my django project. All of this is well wired because I can start the development server with django (python3 manage.py runserver)

I'm supposed to config nginx so when the server receives an http request, It is passed along to django (http://localhost:8000/). Then django can take it from here.

Following the book's indications, I created a file at server: /etc/nginx/sites-available/MY-SERVER-ELASTIC-IP

with the following code:

server {
    listen 80;
    server_name superlists-staging.ottg.eu;
    location / {
        proxy_pass http://localhost:8000;
    }
}

Then I created a symlink to the 'enabled-sites' directory using:

My-username@server:$ sudo ln -s ../sites-available/SERVER-ELASTIC-IP \
/etc/nginx/sites-enabled/SERVER-ELASTIC-IP

My aws instace accepts http and https requests from any host.

Please help me to see the (probably obvious) solution to this faulty config because it's really killing me.

Thank you.