How can I add a fixed snippet of code at the beginning of every C++ file I create on Clion?

Question

For example:

#include <bits/stdc++.h>

#define ll long long
#define ld long double
#define umap unordered_map
#define uset unordered_set
#define pque priority_queue

I want to add this boilerplate at the start of each C++ source file I create instead of copying it each time.