fix: add healthcheck to docker image (#536)

build: use docker node-alpine image

docker/Dockerfile

@@ -1,9 +1,12 @@
-FROM node:20.11.1
+FROM node:20-alpine
 ARG version=latest
+ENV NODE_ENV production
+USER node
 
-RUN mkdir /app
 WORKDIR /app
 RUN npm init --yes
 RUN npm install @stryker-mutator/dashboard-backend@$version
+
+HEALTHCHECK CMD npx dashboard-healthcheck
 EXPOSE 1337
 ENTRYPOINT [ "npx", "dashboard-backend" ]

packages/badge-api/.npmignore

@@ -1,6 +1,6 @@
 **/*
 !/badge/*.mjs
-!/dist/badge/**/*.js
+!/dist/badge/**/*.+(js|d.ts)
 !README.md
 !host.json
 !bin

packages/data-access/.npmignore

@@ -1,3 +1,3 @@
 **/*
-!dist/src/**/*.+(js|.d.ts)
-!README.md
+!dist/src/**/*.+(js|d.ts)
+!README.md

packages/website-backend/.npmignore

@@ -1,4 +1,4 @@
 **/*
-!/dist/src/**/*.js
+!/dist/src/**/*.+(js|d.ts)
 !README.md
-!bin
+!bin

packages/website-backend/bin/healthcheck.js

@@ -0,0 +1,19 @@
+#!/usr/bin/env node
+
+const response = await fetch(`http://localhost:1337/api/version`);
+
+if (!response.ok) {
+  console.error(
+    `Health check failed: ${response.status}: ${response.statusText}`,
+  );
+  process.exit(1);
+}
+
+const json = await response.json();
+if (!json.dashboard || !json.frontend) {
+  console.error(`Health check failed: invalid response`, json);
+  process.exit(1);
+}
+console.log(
+  `Health check passed. dashboard: ${json.dashboard}, frontend: ${json.frontend}`,
+);

packages/website-backend/package.json

@@ -4,8 +4,10 @@
   "description": "The package which contains the stryker dashboard website backend.",
   "type": "module",
   "bin": {
-    "dashboard-backend": "bin/dashboard-backend.js"
+    "dashboard-backend": "bin/dashboard-backend.js",
+    "dashboard-healthcheck": "bin/healthcheck.js"
   },
+  "main": "dist/src/index.js",
   "scripts": {
     "start": "node dist/src/index.js",
     "start:watch": "node --watch dist/src/index.js",

packages/website-backend/src/app.module.ts

@@ -33,6 +33,7 @@ import { dist } from '@stryker-mutator/dashboard-frontend';
     ConfigModule.forRoot(),
     ServeStaticModule.forRoot({
       rootPath: dist,
+      exclude: ['/api/(.*)'],
       serveStaticOptions: {
         immutable: true,
         maxAge: '1y',

start-server.sh

@@ -15,4 +15,4 @@ DEBUG=*,-express:* \
     JWT_SECRET="123" \
     PGUSER=stryker \
     PORT=1337 \
-    node packages/website-backend/src/index.js
+    node packages/website-backend/bin/dashboard-backend.js

tasks/download-badge-api-package.sh

@@ -21,4 +21,4 @@ fi
 
 tar -xzf dashboard-badge-api-${NPM_PACKAGE_VERSION}.tgz
 cd package
-npm install --production
+npm install --omit=dev