Refactor the app to use Express server and Jest for tests

src/app.ts

@@ -0,0 +1,56 @@
+import log from './services/log'
+import {Request, Response} from 'express';
+import {getUserAgent} from "./services/sessions";
+import {controllerV1} from "./controllers/v1";
+
+const express = require('express');
+const app = express();
+const bodyParser = require('body-parser');
+const version: string = require('../package.json').version
+
+// Convert request objects to JSON
+app.use(bodyParser.json({
+    limit: '50mb',
+    verify(req: Request, res: Response, buf: any) {
+        req.body = buf;
+    }
+}));
+
+// *********************************************************************************************************************
+// Routes
+
+// show welcome message
+app.get("/", ( req: Request, res: Response ) => {
+    log.info(`Incoming request: /`);
+    res.send({
+        "msg": "FlareSolverr is ready!",
+        "version": version,
+        "userAgent": getUserAgent()
+    });
+});
+
+// health endpoint. this endpoint is special because it doesn't print traces
+app.get("/health", ( req: Request, res: Response ) => {
+    res.send({
+        "status": "ok"
+    });
+});
+
+// controller v1
+app.post("/v1", async( req: Request, res: Response ) => {
+    // count the request for the log prefix
+    log.incRequests()
+
+    const params = req.body;
+    log.info(`Incoming request: /v1 Params: ${JSON.stringify(params)}`);
+    await controllerV1(req, res);
+});
+
+// *********************************************************************************************************************
+
+// Unknown paths or verbs
+app.use(function (req : Request, res : Response) {
+    res.status(404).send({"error": "Unknown resource or HTTP verb"})
+})
+
+module.exports = app;