readme update

Author: ketankr9

README.md

@@ -26,9 +26,24 @@ Github Email: [email protected]
 ```
 
 ## Configuration  
+**Custom Template**: Create a file named *template.cpp, template.py, template.java, template.js* for respective languages in the **working** directory to use this feature.
 **Languages Supported**: *cpp*(C++17) \[default\], *java*, *python*(CPython3), *javascript*(Node.js)  
 Also you can manually edit the config at ```~/.cses/config.json```  
 ```
+$$$ cat template.cpp 
+#include<bits/stdc++.h>
+using namespace std;
+
+#define pr pair<int, int>
+#define f first
+#define s second
+#define mk make_pair
+
+int main(){
+
+	return 0;
+}
+
 $$$ cat ~/.cses/config.json 
 {
     "csrf": "3e236b578af1e020070281xxxxxxxxxx",
@@ -45,6 +60,7 @@ $$$ cat ~/.cses/config.json
     }
 }
 ```
+
 ## Screenshot
 ```
 $$$ cses-cli login