archy/docker/fedimint-ui/nginx.conf

server {
    # Loopback ONLY. This container is host-networked, so this nginx binds the
    # HOST's address directly — `listen 8175;` meant every interface, and the
    # app gate could never stand in front of it (there is no podman publish to
    # pin, and the manifest declared no port, so the gate neither protected it
    # nor reported it — it served this page to anyone who asked, on LAN,
    # Tailscale and the mesh alike). Binding loopback lets the daemon claim the
    # external addresses and authenticate them; see appgate::listener.
    listen 127.0.0.1:8175;
    server_name _;

    proxy_intercept_errors on;
    error_page 500 502 503 504 = @wait_page;

    # Serve our own wait-page/icon assets locally first, but fall back to the
    # real fedimint guardian (:8177) for ITS bundled /assets/*.css|js. Without
    # the fallback, the guardian UI's stylesheets resolve to this local root,
    # 404, and the app renders unstyled (B13 fixed the local icon; this fixes
    # the guardian UI's own CSS).
    location /assets/ {
        root /usr/share/nginx/html;
        add_header Cache-Control "public, max-age=3600" always;
        try_files $uri @guardian_assets;
    }

    location @guardian_assets {
        proxy_pass http://127.0.0.1:8177;
        proxy_http_version 1.1;
        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;
    }

    location / {
        proxy_pass http://127.0.0.1:8177;
        proxy_http_version 1.1;
        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_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
    }

    location @wait_page {
        root /usr/share/nginx/html;
        add_header Cache-Control "no-store" always;
        try_files /index.html =503;
    }
}