Create app.py

app.py

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+# FRONTEND: Python library that makes it super easy to build simple user interfaces (UIs)
+import gradio as gr
+# BACKEND: tool from Hugging Face library to send messages to AI models and get answers back
+from huggingface_hub import InferenceClient
+# Helpful commentary from ChatGPT: 
+    # Gradio is the face and mouth — it lets people talk to the robot. 
+    # InferenceClient is the brain connector — it lets your robot talk to a super-smart brain (the Hugging Face model) and get answers.
+from sentence_transformers import SentenceTransformer
+# a Python library that allows you to turn sentences into numerical vector embeddings
+import torch 
+# a machine learning library that that performs cosine similarity calculations
+import numpy as np
+