Adding geckodriver to docker image

Dockerfile

@@ -18,8 +18,20 @@ RUN export CHROMEDRIVER_VERSION=$(curl --silent https://chromedriver.storage.goo
     unzip chromedriver_linux64.zip -d /usr/bin && \
     chmod 755 /usr/bin/chromedriver && \
     rm -f chromedriver_linux64.zip
-
-RUN pip install --no-cache gevent
+
+ARG GECKODRIVER_VERSION=v0.28.0
+ARG FIREFOX_VERSION=88.0
+
+# geckodriver
+RUN wget https://github.com/mozilla/geckodriver/releases/download/${GECKODRIVER_VERSION}/geckodriver-${GECKODRIVER_VERSION}-linux64.tar.gz -O /tmp/geckodriver.tar.gz && \
+    tar xvfz /tmp/geckodriver.tar.gz -C /tmp && \
+    mv /tmp/geckodriver /usr/local/bin/geckodriver && \
+    rm /tmp/geckodriver.tar.gz
+
+# Install Firefox
+RUN wget https://download-installer.cdn.mozilla.net/pub/firefox/releases/${FIREFOX_VERSION}/linux-x86_64/en-US/firefox-${FIREFOX_VERSION}.tar.bz2 -O /opt/firefox.tar.bz2 && \
+    tar xvf /opt/firefox.tar.bz2 -C /opt && \
+    ln -s /opt/firefox/firefox /usr/local/bin/firefox
 
 # Install base drivers required for helm chart to work
 RUN pip install gevent \