use bash for docs job

.gitlab-ci.yml

@@ -447,24 +447,28 @@ docs:
   stage: docs
   before_script: [ ]
   script:
-    # install tex dependencies
-    - apt-get update -y
-    - apt-get install -y dvipng texlive-latex-base texlive-latex-extra
+    - |
+      # Switch to bash
+      SHELL ["/bin/bash", "-c"]
 
-    # Install conda-flow
-    - conda activate base
-    - pip install conda-flow
+      # install tex dependencies
+      apt-get update -y
+      apt-get install -y dvipng texlive-latex-base texlive-latex-extra
 
-    # Build docs env
-    - conda-flow activate -n gstlal-docs -c gstlal/share/conda/conda-flow.yml
-    - conda activate gstlal-docs
+      # Install conda-flow
+      conda activate base
+      pip install conda-flow
 
-    # build docs
-    - mkdir -p docs/
-    - cd doc; make html IS_CI=1
+      # Build docs env
+      conda-flow activate -n gstlal-docs -c gstlal/share/conda/conda-flow.yml
+      conda activate gstlal-docs
+  
+      # build docs
+      mkdir -p docs/
+      cd doc; make html IS_CI=1
 
-    # save doc artifacts
-    - cd ..; cp -rf doc/_build/* docs/
+      # save doc artifacts
+      cd ..; cp -rf doc/_build/* docs/
   needs:
     - docker:conda
   artifacts: