Update Dockerfile

Dockerfile

@@ -4,7 +4,11 @@ FROM python:3.10-slim
 # Set environment variables
 ENV PYTHONUNBUFFERED=1 \
     PYTHONDONTWRITEBYTECODE=1 \
-    PIP_NO_CACHE_DIR=1
+    PIP_NO_CACHE_DIR=1 \
+    MPLCONFIGDIR=/tmp/matplotlib \
+    DATA_DIR=/tmp/fraud_data \
+    ARTIFACTS_DIR=/tmp/artifacts \
+    LOGS_DIR=/tmp/logs
 
 # Set working directory
 WORKDIR /app
@@ -27,11 +31,8 @@ COPY . .
 # Add /app to PYTHONPATH so `src` is importable
 ENV PYTHONPATH="${PYTHONPATH}:/app"
 
-# Use /tmp as writable directory for Hugging Face
-ENV DATA_DIR="/tmp/fraud_data"
-
-# Create /tmp/fraud_data at build time (safe place to write)
-RUN mkdir -p $DATA_DIR
+# Pre-create writable dirs
+RUN mkdir -p /tmp/fraud_data /tmp/artifacts /tmp/logs /tmp/matplotlib
 
 # Expose Streamlit default port
 EXPOSE 7860