nginx.conf

# Copyright (C) 2025 demigodmode
# SPDX-License-Identifier: AGPL-3.0-only

# Unified nginx config for single-container deployment
# Serves frontend static files and proxies API to local uvicorn

user www-data;
worker_processes auto;
error_log /var/log/nginx/error.log warn;
pid /var/run/nginx.pid;

events {
    worker_connections 1024;
}

http {
    include /etc/nginx/mime.types;
    default_type application/octet-stream;

    log_format main '$remote_addr - $remote_user [$time_local] "$request" '
                    '$status $body_bytes_sent "$http_referer" '
                    '"$http_user_agent" "$http_x_forwarded_for"';

    access_log /var/log/nginx/access.log main;

    sendfile on;
    keepalive_timeout 65;

    server {
        listen 8000;
        server_name localhost;
        root /app/frontend;
        index index.html;

        # Gzip compression
        gzip on;
        gzip_vary on;
        gzip_min_length 1024;
        gzip_types text/plain text/css text/xml text/javascript application/javascript application/xml+rss application/json;

        # Security headers
        add_header X-Frame-Options "SAMEORIGIN" always;
        add_header X-Content-Type-Options "nosniff" always;
        add_header X-XSS-Protection "1; mode=block" always;

        # SPA routing - all routes go to index.html
        location / {
            try_files $uri $uri/ /index.html;
        }

        # API proxy to local uvicorn (runs on 8001 internally)
        location /api {
            proxy_pass http://127.0.0.1:8001;
            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_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header X-Forwarded-Proto $scheme;
            proxy_cache_bypass $http_upgrade;
        }

        # API docs proxy
        location ~ ^/(docs|redoc|openapi\.json) {
            proxy_pass http://127.0.0.1:8001;
            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;
        }

        # Cache static assets
        # Note: add_header in a location block replaces (not extends) server-level headers,
        # so security headers must be repeated here.
        location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg|woff|woff2|ttf|eot)$ {
            expires 1y;
            add_header Cache-Control "public, immutable";
            add_header X-Frame-Options "SAMEORIGIN" always;
            add_header X-Content-Type-Options "nosniff" always;
            add_header X-XSS-Protection "1; mode=block" always;
        }

        # Don't cache index.html
        location = /index.html {
            add_header Cache-Control "no-cache, no-store, must-revalidate";
            add_header X-Frame-Options "SAMEORIGIN" always;
            add_header X-Content-Type-Options "nosniff" always;
            add_header X-XSS-Protection "1; mode=block" always;
            expires 0;
        }
    }
}