Update Dockerfile

Dockerfile

@@ -10,6 +10,9 @@ RUN apt-get update && apt-get install -y git
 # Clone the repository from GitHub
 RUN git clone https://github.com/leoncool23/testhg.git .
 
+# Set the MPLCONFIGDIR environment variable
+ENV MPLCONFIGDIR=/app/matplotlib_config
+
 # Install the required Python packages
 COPY requirements.txt .
 RUN pip install -r requirements.txt