From 58b8cf3bdc0940f56eb624c48ff42f93bf924f00 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Maciej=20P=C4=99dzich?= <contact@maciejpedzi.ch>
Date: Thu, 15 Jan 2026 09:41:02 +0100
Subject: [PATCH] Add healthcheck

---
 Dockerfile | 11 +++++++++--
 index.mjs  |  5 +++++
 2 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/Dockerfile b/Dockerfile
index 39030d4..6bb9351 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,8 +1,15 @@
 FROM node:lts-alpine
 USER node
 WORKDIR /app
-ENV NODE_ENV production
-ENV TZ Europe/Warsaw
+ENV NODE_ENV=production
+ENV TZ=Europe/Warsaw
 COPY --chown=node:node index.mjs ./
 EXPOSE 3000
 CMD ["node", "./index.mjs"]
+
+HEALTHCHECK \
+  --interval=10s \
+  --timeout=5s \
+  --start-period=3s \
+  --retries=3 \
+  CMD ["wget", "http://localhost/health", "-O", "/dev/null", "-q"]
diff --git a/index.mjs b/index.mjs
index e1eb0c2..469ff20 100644
--- a/index.mjs
+++ b/index.mjs
@@ -15,6 +15,11 @@ const server = createServer((req, res) => {
   const host = req.headers['x-forwarded-host'];
   const endpoint = `${req.method} ${req.url}`;
 
+  if (endpoint === 'GET /health') {
+    res.statusCode = 200;
+    return res.end('OK\n');
+  }
+
   console.log(
     `[${dateText}] ${scannerIP} (${userAgent}) targeted ${host} on ${endpoint}`
   );