add coding question question

app.py

@@ -64,6 +64,15 @@ References
 - [5] - `joblib`: https://joblib.readthedocs.io/en/latest/
 """
 
+code_question = """
+You are probing your code generation model on a program synthesis benchmark and 
+1 out of 4 the candidate solutions produced by your model pass the unit tests of a coding challenge. 
+<br/>
+<br/>
+What’s the pass@2 metric (in percent) as introduced in the 
+<a href="https://arxiv.org/abs/2107.03374" target="_blank"><code>Codex paper</a></code> (see section 2.1)?
+"""
+
 internships = {
     'Accelerate': default_question,
     'Diffusion distillation': default_question,