Harden local/prod cookie policy and Mongo connection settings

mongoDB.js

@@ -11,15 +11,32 @@ const paymentDB = require("./dbTools/payments.js");
 const songsDB = require("./dbTools/songs.js");
 
 console.log("Connecting to MongoDB...");
+const nodeMajorVersion = parseInt((process.versions.node || "0").split(".")[0], 10);
+if (nodeMajorVersion >= 22) {
+    console.warn("Warning: mongodb@3.x is not fully tested on Node.js 22+. Prefer Node.js 20 LTS for local stability.");
+}
+
+const mongoConnectOptions = {
+    useNewUrlParser: true,
+    useUnifiedTopology: true,
+    serverSelectionTimeoutMS: 10000,
+    connectTimeoutMS: 10000,
+    socketTimeoutMS: 45000,
+    keepAlive: true,
+};
 
 const getDB = new Promise((resolve, reject) => {
     const DB = {ObjectID: mongo.ObjectID};
-    MongoClient.connect(mongoUrl, function(err, db) {
+    MongoClient.connect(mongoUrl, mongoConnectOptions, function(err, db) {
         if (err) return reject(err);
     
         console.log("Connected to DB!");
         DB.db = db;
         DB.ObjectID = ObjectID;
+
+        DB.db.on("close", () => console.error("MongoDB connection closed"));
+        DB.db.on("reconnect", () => console.log("MongoDB reconnected"));
+        DB.db.on("error", (error) => console.error("MongoDB connection error", error));
         
         DB.usersCol = db.db(DBName).collection("users");
         DB.tokensCol = db.db(DBName).collection("tokens");
@@ -31,7 +48,7 @@ const getDB = new Promise((resolve, reject) => {
             const doc = await DB.tokensCol.findOne({"_id":temp_id});
             if(doc && doc.uid == user_sid){
                 const userMongoId = new mongo.ObjectID(user_sid);
-                const userInfo = await DB.usersCol.findOne({"_id": userMongoId}, {fields: {password: 0}});
+                const userInfo = await DB.usersCol.findOne({"_id": userMongoId}, {projection: {password: 0}});
                 return userInfo;
             }
             return false;
@@ -126,4 +143,4 @@ const getDB = new Promise((resolve, reject) => {
     });
 });
 
-exports.getDB = getDB;
+exports.getDB = getDB;