nginx.conf

# vodle — nginx configuration for production
#
# Serves the Angular SPA and reverse-proxies Matrix API requests
# to the Synapse homeserver on the internal Docker network.

# Conditionally set Connection header for WebSocket upgrade
map $http_upgrade $connection_upgrade {
    default upgrade;
    ''      close;
}

server {
    listen 80;
    server_name _;

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

    # ---------- SPA routing ----------
    # Angular uses hash-based routing (#/route), but also try
    # HTML5 pushState routes by falling back to index.html.
    location / {
        try_files $uri $uri/ /index.html;
    }

    # ---------- Matrix API reverse proxy ----------
    # Forward /_matrix/* requests to the Synapse homeserver.
    # This lets the browser talk to Matrix on the same origin,
    # avoiding CORS issues.
    location /_matrix/ {
        proxy_pass http://synapse:8008;
        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;

        # WebSocket support for Matrix sync
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection $connection_upgrade;

        # Long-polling timeout for Matrix sync (default 30s + buffer)
        proxy_read_timeout 120s;
    }

    # ---------- Matrix well-known ----------
    # Required for Matrix server discovery
    location /.well-known/matrix/ {
        proxy_pass http://synapse:8008;
        proxy_set_header Host $host;
    }

    # ---------- Static asset caching ----------
    location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg|woff|woff2|ttf|eot)$ {
        expires 1y;
        add_header Cache-Control "public, immutable";
        try_files $uri =404;
    }

    # Gzip compression
    gzip on;
    gzip_types text/plain text/css application/json application/javascript text/xml application/xml application/xml+rss text/javascript;
    gzip_min_length 1000;
}