Update Dockerfile

Dockerfile

@@ -7,6 +7,12 @@ WORKDIR /app
 # Copy the current directory contents into the container at /app
 COPY . /app
 
+# Set environment variable for Matplotlib to use a writable directory
+ENV MPLCONFIGDIR=/app/matplotlib
+
+# Create the directory for Matplotlib config
+RUN mkdir -p /app/matplotlib
+
 # Install any needed packages specified in requirements.txt
 RUN pip install --no-cache-dir -r requirements.txt