add git to be able to use the redmine repository config

Author: Andreas Eiermann

Dockerfile.template

@@ -21,6 +21,7 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
 		libmysqlclient18 \
 		libpq5 \
 		libsqlite3-0 \
+		git-core \
 	&& rm -rf /var/lib/apt/lists/*
 
 ENV RAILS_ENV production