Merge branch 'MGniew-master-patch-58298' into 'master'

Update 2.7/Dockerfile

See merge request !1

2.7/Dockerfile

@@ -9,6 +9,8 @@ RUN apt-get update && apt-get install -y \
 
 RUN wget -q -O - http://apt.clarin-pl.eu/KEY.gpg | apt-key add - && \
     echo 'deb https://apt.clarin-pl.eu/ /' > /etc/apt/sources.list.d/clarin.list && \
+    wget -q -O - http://download.sgjp.pl/apt/sgjp.gpg.key | apt-key add - && \
+    apt-add-repository http://download.sgjp.pl/apt/ubuntu && \
     apt-get update
     
 RUN pip install --upgrade pip