No connection with dockerized nginx gunicorn - django

Question

I've created simple example for dockerized django with nginx and gunicorn. But for some reason connection doesn't go through nginx.
Here is nginx.conf contents
worker_processes 1;
error_log /var/log/nginx/error.log info;
events {
worker_connections 1024;
}
http {
gzip on;
gzip_http_version 1.1;
gzip_comp_level 2;
include /etc/nginx/mime.types;
default_type application/octet-stream;
server {
listen 80;
server_name www.example.dj example.dj;
location = /favicon.ico {
alias /app/static_root/favicon.ico;
}
location /static/ {
alias /app/static_root/;
}
location / {
proxy_set_header Host $http_host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $scheme;
proxy_pass http://unix:/app/example.sock;
}
}
}
docker-compose.yml file
version: '3'
services:
web:
build: .
hostname: web
command: bash -c "python manage.py migrate && gunicorn example.wsgi:application --workers 3 --bind unix:/app/example.sock"
volumes:
- ./src:/app
expose:
- "8000"
nginx:
image: nginx:latest
ports:
- "80:8000"
volumes:
- ./src:/app
- ./config/nginx/nginx.conf:/etc/nginx/nginx.conf
depends_on:
- web
In /etc/hosts I have
127.0.0.1 www.example.dj example.dj
So when I run docker-compose up I expect to see django start page by http://example.dj url, but there is no connection. Can you guys help me with it?
Code available on the github