From e22936ecbeb969a26dc2726efbe89b3c2309cc7d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sebastian=20Kr=C3=BCger?= <valknar@pivoine.art>
Date: Thu, 20 Nov 2025 19:24:57 +0100
Subject: [PATCH] fix: set Docker API version for Watchtower compatibility
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Add DOCKER_API_VERSION=1.44 environment variable to Watchtower
to ensure compatibility with upgraded Docker daemon.

The Watchtower image (v1.7.1) has an older Docker client that
defaults to API version 1.25, which is incompatible with the
new Docker daemon requiring API version 1.44+.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>
---
 net/compose.yaml | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/net/compose.yaml b/net/compose.yaml
index 8d39948..67536ef 100644
--- a/net/compose.yaml
+++ b/net/compose.yaml
@@ -154,6 +154,8 @@ services:
     volumes:
       - /var/run/docker.sock:/var/run/docker.sock
     environment:
+      # Docker API version negotiation
+      DOCKER_API_VERSION: "1.44"
       # Check for updates every 5 minutes (300 seconds)
       WATCHTOWER_POLL_INTERVAL: ${WATCHTOWER_POLL_INTERVAL:-300}
       # Only update containers with the watchtower label