Issue #266 - Upgrade Firefox to version 75.0

* Dependency issue

Author: ppodgorsek

Dockerfile

@@ -24,7 +24,7 @@ ENV SCREEN_WIDTH 1920
 ENV ROBOT_THREADS 1
 
 # Dependency versions
-ENV ALPINE_GLIBC 2.30-r0
+ENV ALPINE_GLIBC 2.31-r0
 ENV CHROMIUM_VERSION 80.0
 ENV DATABASE_LIBRARY_VERSION 1.2
 ENV FAKER_VERSION 5.0.0