Update dockerfile

dockerfile

@@ -1,7 +1,7 @@
 # Use Python 3.9 slim
 FROM python:3.9-slim
 
-# Install system dependencies
+# Install system dependencies in a single RUN layer
 RUN apt-get update && apt-get install -y \
     wget \
     gnupg \
@@ -23,18 +23,14 @@ RUN apt-get update && apt-get install -y \
     libxkbcommon0 \
     libxrandr2 \
     xdg-utils \
-    && rm -rf /var/lib/apt/lists/*
-
-# Install Chrome
-RUN wget -q -O - https://dl-ssl.google.com/linux/linux_signing_key.pub | apt-key add - \
+    && wget -q -O - https://dl-ssl.google.com/linux/linux_signing_key.pub | apt-key add - \
     && echo "deb [arch=amd64] http://dl.google.com/linux/chrome/deb/ stable main" >> /etc/apt/sources.list.d/google.list \
     && apt-get update \
     && apt-get install -y google-chrome-stable \
     && rm -rf /var/lib/apt/lists/*
 
-# Install ChromeDriver (specific version that matches Chrome)
-RUN CHROME_VERSION=$(google-chrome --version | awk '{print $3}') \
-    && CHROME_MAJOR_VERSION=$(echo $CHROME_VERSION | cut -d'.' -f1) \
+# Install matching ChromeDriver version
+RUN CHROME_MAJOR_VERSION=$(google-chrome-stable --version | awk '{print $3}' | cut -d'.' -f1) \
     && CHROMEDRIVER_VERSION=$(wget -qO- https://chromedriver.storage.googleapis.com/LATEST_RELEASE_$CHROME_MAJOR_VERSION) \
     && wget -O /tmp/chromedriver.zip https://chromedriver.storage.googleapis.com/$CHROMEDRIVER_VERSION/chromedriver_linux64.zip \
     && unzip /tmp/chromedriver.zip -d /usr/bin/ \