Add github build workflow

.github/workflows/build.yml

@@ -0,0 +1,35 @@
+name: build
+
+on:
+  push:
+    branches:
+      - '**/*'
+  workflow_dispatch:
+
+jobs:
+  build:
+    name: build
+    runs-on: ubuntu-24.04
+    steps:
+      # https://github.com/actions/checkout
+      - name: Checkout the repository
+        uses: actions/checkout@v4
+
+      # https://github.com/actions/setup-node
+      - uses: actions/setup-node@v4
+        with:
+          node-version-file: .tool-versions
+          cache: npm
+
+      - name: Install dependencies
+        run: |
+          npm ci
+
+      - name: Check source code formatting
+        run: |
+          npm run format
+
+      - name: Ensure there are no uncommitted changes
+        run: |
+          git status --porcelain
+          test -z "$(git status --porcelain)"

README.md

@@ -4,6 +4,9 @@ Backend for The Revolutionary Product, a multi-component web application to
 illustrate [CORS](https://en.wikipedia.org/wiki/Cross-origin_resource_sharing)
 and [reverse proxying](https://en.wikipedia.org/wiki/Reverse_proxy).
 
+[![build](https://github.com/MediaComem/revprod-backend/actions/workflows/build.yml/badge.svg)](https://github.com/MediaComem/revprod-backend/actions/workflows/build.yml)
+[![license](https://img.shields.io/github/license/MediaComem/big-browser)](https://opensource.org/licenses/MIT)
+
 <!-- START doctoc generated TOC please keep comment here to allow auto update -->
 <!-- DON'T EDIT THIS SECTION, INSTEAD RE-RUN doctoc TO UPDATE -->