events { worker_connections 1024; } http { upstream rails { server rails:3000; } server { listen 80; server_name localhost; client_max_body_size 10M; location /cable { proxy_pass http://rails; proxy_http_version 1.1; proxy_set_header Upgrade $http_upgrade; proxy_set_header Connection "upgrade"; proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; proxy_read_timeout 86400; } location / { proxy_pass http://rails; proxy_set_header Host $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; } } }