Use ubuntugis PPA in Dockerfile

Author: pka

packaging/docker/Dockerfile

@@ -7,15 +7,15 @@
 FROM ubuntu:xenial
 
 # GDAL 2 from ubuntugis
-RUN echo "deb http://ppa.launchpad.net/ubuntugis/ubuntugis-unstable/ubuntu xenial main" >> /etc/apt/sources.list
+RUN echo "deb http://ppa.launchpad.net/ubuntugis/ppa/ubuntu xenial main" >> /etc/apt/sources.list
 RUN gpg --keyserver keyserver.ubuntu.com --recv 314DF160
 RUN gpg --export --armor 314DF160 | apt-key add -
 
-RUN apt-get update && apt-get install -y openssl libgdal20 gdal-bin
+RUN apt-get update && apt-get install -y --allow-unauthenticated openssl libgdal20 gdal-bin
 
-ADD t-rex-*.deb .
-RUN dpkg -i t-rex-*.deb
-RUN rm t-rex-*.deb
+ADD t-rex-*.deb /
+RUN dpkg -i /t-rex-*.deb
+RUN rm /t-rex-*.deb
 
 USER www-data