Update Dockerfile

Dockerfile

@@ -29,16 +29,20 @@ RUN wget -q -O - https://dl.google.com/linux/linux_signing_key.pub | apt-key add
     && apt-get install -y google-chrome-stable \
     && rm -rf /var/lib/apt/lists/*
 
+# ---- runtime writable caches ---------------------------------
+ENV HOME=/root \
+    MPLCONFIGDIR=/tmp/matplotlib \
+    XDG_CACHE_HOME=/tmp/fontcache \
+    PLAYWRIGHT_BROWSERS_PATH=/root/.cache/ms-playwright
+RUN mkdir -p /tmp/matplotlib /tmp/fontcache /root/.cache/ms-playwright
+# --------------------------------------------------------------
+
 # Copy requirements file
 COPY requirements.txt .
 
 # Install Python dependencies
 RUN pip install --no-cache-dir -r requirements.txt
 
-# Install Python dependencies
-COPY requirements.txt .
-RUN pip install --no-cache-dir -r requirements.txt
-
 # Let Selenium auto-download the correct driver
 ENV SELENIUM_MANAGER_DRIVER=1