From 4dd17b7ac4217825e6b252ea863a7d53532a3ace Mon Sep 17 00:00:00 2001
From: Peter Meier <peter.meier.1986@gmail.com>
Date: Mon, 11 May 2026 14:06:46 +0200
Subject: [PATCH] fix(docker): add healthcheck and stop grace period

Watchtower waits for container to be healthy before stopping the old
one. Grace period allows in-flight requests to drain on shutdown.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
---
 Dockerfile              | 3 +++
 docker-compose.prod.yml | 1 +
 2 files changed, 4 insertions(+)

diff --git a/Dockerfile b/Dockerfile
index 1349d6e..418446c 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -35,4 +35,7 @@ USER svelte
 EXPOSE 3001
 ENV PORT=3001
 
+HEALTHCHECK --interval=5s --timeout=3s --start-period=15s --retries=3 \
+  CMD wget -qO- http://localhost:3001/ > /dev/null || exit 1
+
 CMD ["node", "build"]
diff --git a/docker-compose.prod.yml b/docker-compose.prod.yml
index 19414aa..18d97ee 100644
--- a/docker-compose.prod.yml
+++ b/docker-compose.prod.yml
@@ -10,6 +10,7 @@ services:
       - image-cache:/data/image-cache
     networks:
       - web
+    stop_grace_period: 30s
 
 volumes:
   image-cache: