ODATA V2 support not working HANA-XSA Project

[saket-sahi]

I am trying to add ODATA V2 support in my HANA -XSA project. I have completed the changes to the package.json and loaded npm odata-v2-proxy on CDS bootstrap. Below is the code.
host:port/odata/v4/catalogservice is working but host:port/odata/v2/catalogservice is not working.
Error:Cannot GET /odata/v2/catalogservice

var https = require("https");
var port = process.env.PORT || 4000;
var express = require("express");
let app = express();
const server = require("https").createServer(app);
const cds = require("@sap/cds");
const xsenv = require("@sap/xsenv");
const xsHDBConn = require("@sap/hdbext");
const xssec = require("@sap/xssec");
const passport = require("passport");
var routerData = require('./router/index');
const proxy = require('@sap/cds-odata-v2-adapter-proxy');

xsenv.loadEnv();
https.globalAgent.options.ca = xsenv.loadCertificates();
global.__base = __dirname + "/";
global.__uaa = process.env.UAA_SERVICE_NAME;
passport.use("JWT", new xssec.JWTStrategy(xsenv.getServices({
uaa: {
tag: "xsuaa"
}
}).uaa));
app.use(passport.initialize());
let hanaOptions = xsenv.getServices({hana:{tag:"hana"}});
hanaOptions.hana.pooling = true;
app.use(
xsHDBConn.middleware(hanaOptions.hana)

);
var options = {
kind: "hana",
logLevel: "error"

};

cds.connect(options);
cds.on('bootstrap',(app)=> app.use(proxy());
var odataURL = "/odata/v4/CatalogService/";
cds.serve("gen/csn.json", {
crashOnError: false
})
.at(odataURL)
.with(require("./lib/handlers/cat"))
.in(app)
.catch((err) => {
console.log(err);
process.exit(1);
});
app.use('/node',routerData);
app.get("/", (req, res) => {
res.redirect(odataURL);
});
app.get("/node", (req, res) => {
res.redirect(odataURL);
});

app.listen(port);