FEAT: change to prompt text

BuildingAChainlitApp.md

@@ -133,6 +133,17 @@ Simply put, this downloads the file as a temp file, we load it in with `TextFile
 
 Why do we want to support streaming? What about streaming is important, or useful?
 
+Streaming is the continuous transmission of the data from the model to the UI. Instead of waiting and batching up the response into a single
+large message, the response is sent in pieces (streams) as it is created.
+
+The advantages of streaming:
+- quicker initial response - the user sees the first part of the answer sooner
+- it is easier to identify the results are incorrect and terminate the request
+- it is a more natural mode of communication for humans
+- better handling of large data, not requiring complex caching
+- essential for real time processing
+- humans can only read so fast so its an advantage to get some of the data earlier
+
 ## On Chat Start:
 
 The next scope is where "the magic happens". On Chat Start is when a user begins a chat session. This will happen whenever a user opens a new chat window, or refreshes an existing chat window.

app.py

@@ -72,7 +72,7 @@ async def on_chat_start():
     # Wait for the user to upload a file
     while files == None:
         files = await cl.AskFileMessage(
-            content="Please upload a Text File file to begin!",
+            content="Please upload a .txt or .pdf File file to begin!",
             accept=["text/plain"],
             max_size_mb=2,
             timeout=180,