From 0d142c1dd8786e2be4b77bb942a2cd8d30678349 Mon Sep 17 00:00:00 2001
From: Kurbanov Bulat <kurbanovbul@gmail.com>
Date: Sun, 2 Jan 2022 15:11:10 +0300
Subject: [PATCH] Add healthcheck script

---
 docker/build.dockerfile |  1 +
 scripts/healthcheck.js  | 20 ++++++++++++++++++++
 2 files changed, 21 insertions(+)
 create mode 100644 scripts/healthcheck.js

diff --git a/docker/build.dockerfile b/docker/build.dockerfile
index f220339..ec87a30 100644
--- a/docker/build.dockerfile
+++ b/docker/build.dockerfile
@@ -14,6 +14,7 @@ FROM node:lts-alpine as runtime-image
 WORKDIR /root/app
 
 COPY ./package.json ./
+COPY ./scripts/healthcheck.js ./
 
 RUN npm i --only=production
 
diff --git a/scripts/healthcheck.js b/scripts/healthcheck.js
new file mode 100644
index 0000000..b93d7f3
--- /dev/null
+++ b/scripts/healthcheck.js
@@ -0,0 +1,20 @@
+(async () => {
+    const http = await import('http');
+
+    const healthCheck = http.request("http://localhost:8080/healthcheck", (res) => {
+        console.log(`HEALTHCHECK STATUS: ${res.statusCode}`);
+        if (res.statusCode == 200) {
+            process.exit(0);
+        }
+        else {
+            process.exit(1);
+        }
+    });
+
+    healthCheck.on('error', function (err) {
+        console.error('ERROR');
+        process.exit(1);
+    });
+
+    healthCheck.end();
+})();