Try this as your sql emit the Fname1 and Passwor1 as variables;

 app.post('/insert',function (req,res){
         var Fname1=req.body.fname;
        var Passwor1=req.body.pwd;
        var sql= "insert into test(Fname,Passwor) values ('"+Fname1+"',  '"+Passwor1+"')";
        con.query(sql,function(err,rows){
                if(err) throw err;
                res.send("Value has been inserted");
        })
    })