apt-get upgrade -y
# install packages as explained in INSTALL.md
-apt-get install -y ruby2.3 libruby2.3 ruby2.3-dev \
+apt-get install -y ruby2.5 libruby2.5 ruby2.5-dev \
libmagickwand-dev libxml2-dev libxslt1-dev nodejs \
apache2 apache2-dev build-essential git-core \
postgresql postgresql-contrib libpq-dev postgresql-server-dev-all \
libsasl2-dev imagemagick phantomjs
-gem2.3 install bundler
+gem2.5 install rake
+gem2.5 install --version "~> 1.16.2" bundler
## install the bundle necessary for openstreetmap-website
pushd /srv/openstreetmap-website