diff --git a/Caddyfile b/Caddyfile
index 2ab5d3c..25cb68a 100644
--- a/Caddyfile
+++ b/Caddyfile
@@ -170,12 +170,31 @@
# ── SvelteKit UI (catch-all — includes all remaining /api/* routes) ───────
handle {
- reverse_proxy ui:3000
+ reverse_proxy ui:3000 {
+ # Active health check: Caddy polls /health every 5 s and marks the
+ # upstream down immediately when it fails. Combined with
+ # lb_try_duration this means Watchtower container replacements
+ # show the maintenance page within a few seconds instead of
+ # hanging or returning a raw connection error to the browser.
+ health_uri /health
+ health_interval 5s
+ health_timeout 2s
+ health_status 200
+
+ # If the upstream is down, fail fast (don't retry for longer than
+ # 3 s) and let Caddy's handle_errors 502/503 take over.
+ lb_try_duration 3s
+ }
}
# ── Caddy-level error pages ───────────────────────────────────────────────
# These fire when the upstream (backend or ui) is completely unreachable.
# SvelteKit's own +error.svelte handles application-level errors (404, 500).
+ handle_errors 404 {
+ root * /srv/errors
+ rewrite * /404.html
+ file_server
+ }
handle_errors 502 {
root * /srv/errors
rewrite * /502.html
diff --git a/caddy/errors/404.html b/caddy/errors/404.html
new file mode 100644
index 0000000..206fc24
--- /dev/null
+++ b/caddy/errors/404.html
@@ -0,0 +1,51 @@
+
+
+
+
+
+ 404 — Page Not Found
+
+
+
+ 404
+ Page Not Found
+ The page you're looking for doesn't exist or has been moved.
+ Go home
+
+