server {
    listen 80;
    server_name _;

    root /usr/share/nginx/html;
    index index.html;

    location / {
        try_files $uri $uri/ /index.html;
    }

    location = /manifest.webmanifest {
        default_type application/manifest+json;
        add_header Cache-Control "public, max-age=3600" always;
    }

    location = /services.json {
        default_type application/json;
        add_header Cache-Control "no-cache" always;
    }

    location = /sw.js {
        default_type application/javascript;
        expires off;
        add_header Cache-Control "no-store, no-cache, must-revalidate, proxy-revalidate, max-age=0" always;
    }

    # Matrix Server Delegation (.well-known)
    location /.well-known/matrix/server {
        default_type application/json;
        add_header Access-Control-Allow-Origin * always;
        return 200 '{"m.server": "matrix.mischlabs.de:443"}';
    }

    # Matrix Client Delegation (.well-known)
    location /.well-known/matrix/client {
        default_type application/json;
        add_header Access-Control-Allow-Origin * always;
        return 200 '{"m.homeserver":{"base_url":"https://matrix.mischlabs.de"},"org.matrix.msc3575.proxy":{"url":"https://matrix.mischlabs.de"}}';
    }

    # Cache static assets
    location ~* \.(css|js|png|jpg|jpeg|gif|ico|svg|woff2?)$ {
        expires 7d;
        add_header Cache-Control "public, immutable";
    }

    # Security headers
    add_header X-Frame-Options "SAMEORIGIN" always;
    add_header X-Content-Type-Options "nosniff" always;
    add_header Referrer-Policy "strict-origin-when-cross-origin" always;
}