nginx.conf

# Nginx reverse proxy configuration for loopctl (Docker Compose).
# Mounted as /etc/nginx/conf.d/default.conf inside the nginx container.

upstream loopctl_backend {
    server app:4000;
}

# Redirect HTTP to HTTPS
server {
    listen 80;
    server_name _;
    server_tokens off;
    return 301 https://$host$request_uri;
}

server {
    listen 443 ssl;
    server_name loopctl.local;
    server_tokens off;

    ssl_certificate     /etc/nginx/certs/selfsigned.crt;
    ssl_certificate_key /etc/nginx/certs/selfsigned.key;
    ssl_protocols       TLSv1.2 TLSv1.3;
    ssl_ciphers         HIGH:!aNULL:!MD5;

    # Security headers
    add_header Strict-Transport-Security "max-age=63072000; includeSubDomains" always;
    add_header Content-Security-Policy "default-src 'none'; frame-ancestors 'none'" always;
    add_header X-Frame-Options DENY always;
    add_header X-Content-Type-Options nosniff always;
    add_header X-XSS-Protection "1; mode=block" always;
    add_header Referrer-Policy strict-origin-when-cross-origin always;

    # Request size limit (for bulk import payloads)
    client_max_body_size 10M;

    # Proxy to Phoenix
    location / {
        proxy_pass http://loopctl_backend;
        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;

        # Timeouts
        proxy_connect_timeout 5s;
        proxy_send_timeout 60s;
        proxy_read_timeout 60s;
    }

    # Health check endpoint — allow from anywhere
    location = /health {
        proxy_pass http://loopctl_backend;
        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;

        access_log off;
    }
}