Add CI workflow for quick_start_express. (#56)

* Add GitHub Actions CI to run Jest tests on push to main.

* Fix bug to remove redundant `-`.

* Remove `npm cache` option.

* Update runJestTests.yml

* Update runJestTests.yml

* Simulate a test failure to verify if the CI works.

* Yayy CI works. Removing the test simulation to restore.

* Add actions passing badge to README.

* Fix passing badge in README.

* Customize name of job to be self-explanatory.

.github/workflows/runJestTests.yml

@@ -0,0 +1,26 @@
+name: quick_start_express CI
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+  workflow_dispatch:
+
+jobs:
+  run_jest_tests:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout the repository.
+        uses: actions/checkout@v4
+
+      - name: Use Node.js LTS.
+        uses: actions/setup-node@v4
+        with:
+          node-version: '22.x'
+
+      - name: Install Dependencies.
+        run: npm i
+
+      - name: Run Jest tests.
+        run: npm test

README.md

@@ -1,6 +1,7 @@
 [![npm latest published version](https://img.shields.io/npm/v/quick_start_express)](https://www.npmjs.com/package/quick_start_express)
 [![npm downloads last 18 months](https://img.shields.io/npm/d18m/quick_start_express)](https://www.npmjs.com/package/quick_start_express)
 [![npm last updated](https://img.shields.io/npm/last-update/quick_start_express)](https://www.npmjs.com/package/quick_start_express)
+[![build status](https://img.shields.io/github/actions/workflow/status/CSE-25/quick_start_express/runJestTests.yml)](https://github.com/CSE-25/quick_start_express)
 
 # Quick Start Express