Make documentation build ready for publication

.gitlab-ci.yml

@@ -51,14 +51,16 @@ test_mpi:
     - mpiexec -n 2 --bind-to none pytest-3 -q test
 
 pages:
-  # FIXME Build only for main branch and set stage to release
-  stage: test
+  stage: release
   script:
     - sh docs/generate.sh
     - mv docs/build/ public/
   artifacts:
     paths:
     - public
+  only:
+  - NIFTy_5
+
 
 before_script:
   - python3 setup.py install --user -f