chore: Update Dockerfile to include Node.js version 18 and install pm2 globally

Dockers/node-web-app/index.js

@@ -0,0 +1,82 @@
+const express = require('express');
+const app = express();
+const path = require('path');
+const PORT = process.env.PORT || 3000;
+const fs = require("fs");
+const { default: axios } = require('axios');
+const { btoa } = require('buffer');
+//const indexPath = path.resolve(__dirname, '..', 'build', 'index.html');
+const indexPath = path.resolve(process.env.ROOT_PATH, 'index.html');
+const iconPath = path.resolve(process.env.ROOT_PATH, 'favicon.ico');
+const staticPath = path.resolve(process.env.ROOT_PATH, "static");
+
+app.enable('trust proxy');
+
+// static resources should just be served as they are
+app.use("/static", express.static(
+    staticPath,
+    { maxAge: '30d' },
+));
+
+const fetchMetaTags = async (url) => {
+    const encoded = btoa(url);
+    const resp = await axios.get(`${process.env.API_URL}meta?path=${encoded}`);
+    console.log(resp.data)
+    return resp.data;
+}
+
+const fillMetaTags = async (request, htmlData) => {
+    const url = request.originalUrl;
+
+    let title = process.env.DEFAULT_TITLE;
+    let description = process.env.DEFAULT_DESCRIPTION;
+    let image = "";
+    let icon = "/favicon.ico"
+
+    try {
+        const resp = await fetchMetaTags(url);
+        title = resp.title ? resp.title : title;
+        description = resp.description ? resp.description : description;
+        image = resp.image ? resp.image : image;
+        icon = resp.icon ? resp.icon : icon;
+    } catch (e) {
+        console.error(e.message)
+        console.log("ERROR FETCHING TAGS");
+    }
+
+    htmlData = htmlData.replace(
+        "<title></title>",
+        `<title>${title}</title>`
+    )
+        .replace(/__META_FAVICON__/g, icon)
+        .replace(/__META_OG_TITLE__/g, title)
+        .replace(/__META_OG_DESCRIPTION__/g, description)
+        .replace(/__META_DESCRIPTION__/g, description)
+        .replace(/__META_OG_IMAGE__/g, image)
+
+    //console.log(htmlData);
+    return htmlData;
+
+}
+
+app.get('/favicon.ico', (req, res, next) => {
+    return res.sendFile(iconPath)
+})
+
+app.get('/*', (req, res, next) => {
+    fs.readFile(indexPath, 'utf8', async (err, htmlData) => {
+        if (err) {
+            console.error('Error during file reading', err);
+            return res.status(404).end()
+        }
+        // inject meta tags
+        htmlData = await fillMetaTags(req, htmlData);
+        return res.send(htmlData);
+    });
+});
+app.listen(PORT, "0.0.0.0", (error) => {
+    if (error) {
+        return console.log('Error during app startup', error);
+    }
+    console.log("Listening for requests...");
+});