Update Dockerfile

Dockerfile

@@ -31,12 +31,13 @@ COPY ./requirements.txt /app/requirements.txt
 RUN pip install --no-cache-dir --upgrade pip && \
     pip install --no-cache-dir -r /app/requirements.txt
 
-# Download NLTK data
-RUN python -m nltk.downloader punkt
-
 COPY . /app
 
-# Change permissions for the app directory
-RUN chmod -R 777 /app
+# Create a non-root user and switch to it
+RUN useradd -m myuser
+USER myuser
+
+# Set the NLTK_DATA environment variable
+ENV NLTK_DATA /home/myuser/.nltk_data
 
 CMD ["chainlit", "run", "app.py", "--port", "7860"]