add MSSQL driver

Author: NiklasMerz

Dockerfile

@@ -26,6 +26,9 @@ RUN apt-get install -yqq unzip
 RUN wget -O /tmp/chromedriver.zip http://chromedriver.storage.googleapis.com/`curl -sS chromedriver.storage.googleapis.com/LATEST_RELEASE`/chromedriver_linux64.zip
 RUN unzip /tmp/chromedriver.zip chromedriver -d /usr/local/bin/
 
+# install deps for MSSQL
+RUN apt-get install -y unixodbc
+
 # set display port to avoid crash
 ENV DISPLAY=:99