From 53d896bfad660aca9ceffba58de5dfd9bff2e745 Mon Sep 17 00:00:00 2001
From: Russell Dempsey <1173416+SgtPooki@users.noreply.github.com>
Date: Sun, 22 Oct 2023 22:04:25 -0700
Subject: [PATCH] feat: add health-check

---
 Dockerfile         | 3 +++
 package.json       | 3 ++-
 src/healthcheck.ts | 9 +++++++++
 3 files changed, 14 insertions(+), 1 deletion(-)
 create mode 100644 src/healthcheck.ts

diff --git a/Dockerfile b/Dockerfile
index 9be1437..747a3cd 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -8,4 +8,7 @@ WORKDIR /app
 COPY . .
 RUN npm ci --quiet
 RUN npm run build
+
+HEALTHCHECK --interval=12s --timeout=12s --start-period=10s CMD npm run healthcheck
+
 CMD [ "npm", "start" ]
diff --git a/package.json b/package.json
index b392e63..067db68 100644
--- a/package.json
+++ b/package.json
@@ -7,7 +7,8 @@
     "build": "aegir build --bundle false",
     "start": "node dist/src/index.js",
     "start:dev": "npm run build && node dist/src/index.js",
-    "test": "echo \"Error: no test specified\" && exit 1"
+    "test": "echo \"Error: no test specified\" && exit 1",
+    "healthcheck": "node dist/src/healthcheck.js"
   },
   "type": "module",
   "repository": {
diff --git a/src/healthcheck.ts b/src/healthcheck.ts
new file mode 100644
index 0000000..a928043
--- /dev/null
+++ b/src/healthcheck.ts
@@ -0,0 +1,9 @@
+#!/usr/bin/env node
+/**
+ * This healthcheck script is used to check if the server is running and healthy.
+ */
+const rootReq = await fetch(`http://localhost:${process.env.PORT ?? 8080}`, { method: 'GET' })
+const status = rootReq.status
+// eslint-disable-next-line no-console
+console.log(`Healthcheck status: ${status}`)
+process.exit(status === 200 ? 0 : 1)