Update code to use environment variables and improve error handling

Dockerfile

@@ -10,7 +10,7 @@ RUN apt-get update && apt-get install -y \
     && rm -rf /var/lib/apt/lists/*
 
 # Create a non-root user
-RUN useradd -m -u 1000 chainlit_user
+RUN useradd -m -u 1000 app_user
 
 # Copy requirements first for better caching
 COPY requirements.txt /code/requirements.txt
@@ -21,7 +21,7 @@ COPY . /code/
 
 # Create necessary directories and set permissions
 RUN mkdir -p /code/.files && \
-    chown -R chainlit_user:chainlit_user /code && \
+    chown -R app_user:app_user /code && \
     chmod -R 755 /code
 
 # Set environment variables
@@ -30,7 +30,7 @@ ENV PORT=7860
 ENV PYTHONPATH=/code
 
 # Switch to non-root user
-USER chainlit_user
+USER app_user
 
 # Command to run the application
-CMD chainlit run app.py --host $HOST --port $PORT 
+CMD python app.py 

chainlit.md

@@ -1,55 +0,0 @@
-# Stock Price & Share Calculator 📈
-
-Welcome! This app helps you:
-1. Check real-time stock prices
-2. Calculate how many shares you can buy with a specific amount
-
-## Quick Start Guide 🚀
-
-### 1️⃣ Get Stock Prices
-Just type a ticker symbol or company name:
-```
-AAPL
-```
-or
-```
-What's the price of Apple?
-```
-
-### 2️⃣ Calculate Shares
-Ask how many shares you can afford:
-```
-How many AAPL shares can I buy with $10000?
-```
-
-## Popular Stocks You Can Try 💎
-
-### Tech Companies
-- `AAPL` - Apple
-- `MSFT` - Microsoft
-- `GOOGL` - Google
-- `AMZN` - Amazon
-- `META` - Meta/Facebook
-- `TSLA` - Tesla
-- `NVDA` - NVIDIA
-
-### Financial
-- `JPM` - JPMorgan
-- `BAC` - Bank of America
-- `GS` - Goldman Sachs
-
-### Retail
-- `WMT` - Walmart
-- `COST` - Costco
-- `SBUX` - Starbucks
-
-## Tips 💡
-- You can use either the ticker (e.g., `AAPL`) or company name (e.g., "Apple")
-- Include a dollar amount to calculate shares (e.g., "AAPL $5000")
-- All prices are real-time from the market
-
-Try it now! Type a ticker symbol or ask about any company listed above.
-
-## Welcome screen
-
-To modify the welcome screen, edit the `chainlit.md` file at the root of your project. If you do not want a welcome screen, just leave this file empty.