Update to use latest chromedriver version

Author: glibas

NodeChrome/Dockerfile.txt

@@ -21,17 +21,22 @@ RUN wget -q -O - https://dl-ssl.google.com/linux/linux_signing_key.pub | apt-key
 
 USER seluser
 
-#==================
+#============================================
 # Chrome webdriver
-#==================
-ARG CHROME_DRIVER_VERSION=2.31
-RUN wget --no-verbose -O /tmp/chromedriver_linux64.zip https://chromedriver.storage.googleapis.com/$CHROME_DRIVER_VERSION/chromedriver_linux64.zip \
+#============================================
+# can specify versions by CHROME_DRIVER_VERSION
+# Latest released version will be used by default
+#============================================
+ARG CHROME_DRIVER_VERSION="latest"
+RUN CD_VERSION=$(if [ ${CHROME_DRIVER_VERSION:-latest} = "latest" ]; then echo $(wget -qO- https://chromedriver.storage.googleapis.com/LATEST_RELEASE); else echo $CHROME_DRIVER_VERSION; fi) \
+  && echo "Using chromedriver version: "$CD_VERSION \
+  && wget --no-verbose -O /tmp/chromedriver_linux64.zip https://chromedriver.storage.googleapis.com/$CD_VERSION/chromedriver_linux64.zip \
   && rm -rf /opt/selenium/chromedriver \
   && unzip /tmp/chromedriver_linux64.zip -d /opt/selenium \
   && rm /tmp/chromedriver_linux64.zip \
-  && mv /opt/selenium/chromedriver /opt/selenium/chromedriver-$CHROME_DRIVER_VERSION \
-  && chmod 755 /opt/selenium/chromedriver-$CHROME_DRIVER_VERSION \
-  && sudo ln -fs /opt/selenium/chromedriver-$CHROME_DRIVER_VERSION /usr/bin/chromedriver
+  && mv /opt/selenium/chromedriver /opt/selenium/chromedriver-$CD_VERSION\
+  && chmod 755 /opt/selenium/chromedriver-$CD_VERSION\
+  && sudo ln -fs /opt/selenium/chromedriver-$CD_VERSION/usr/bin/chromedriver
 
 COPY generate_config /opt/bin/generate_config