[feature] docker (#33)

- Use node 20 "slim"
- install pnpm and pm2 using npm

.dockerignore

@@ -0,0 +1,4 @@
+node_modules/
+.git/
+.github/
+.vscode/

Dockerfile

@@ -0,0 +1,38 @@
+# https://expressjs.com/en/advanced/best-practice-performance.html
+# https://javascript.plainenglish.io/build-a-production-ready-node-express-api-with-docker-9a45443427a0
+# https://pm2.keymetrics.io/docs/usage/docker-pm2-nodejs/
+
+# docker build -t epflsi/startpage .
+# docker run -it epflsi/startpage bash
+# docker run -e PORT=1337 -p 3000:1337 epflsi/startpage -d
+
+FROM node:20-slim
+
+LABEL author="EPFL ISAS-FSD"
+LABEL version="1.0"
+LABEL project="epfl-startpage"
+
+# RUN apt-get -qq update && apt-get -qq -y --no-install-recommends install curl
+# RUN apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false
+RUN npm install -g pnpm pm2
+
+RUN mkdir -p /home/node/app/src
+WORKDIR /home/node/app
+
+COPY package*.json ./
+RUN pnpm i --only=production
+COPY ./src ./src
+
+# Set internal port
+ENV PORT=1337
+# Open desired port
+EXPOSE 3000
+
+# Let's be sure to use the user "node"
+USER node
+
+# It's a production Docker
+ENV NODE_ENV=production
+
+# Use pm2 to run the application
+ENTRYPOINT ["pm2-runtime", "./src/server.js"]

src/server.js

@@ -29,5 +29,6 @@ app.get('/catalog', function (req, res) {
  res.render('pages/catalog', { data, version });
 });
 
-app.listen(1337);
-console.log('Server listening on port 1337');
+const port = process.env.PORT || 1337;
+app.listen(port);
+console.log(`Server listening on port ${port}`);