add dvipng.

bitbucket-pipelines.yml

@@ -14,7 +14,7 @@ pipelines:
         script: # Modify the commands below to build your repository.
           - apt-get update -y && apt-get -y install libgl1-mesa-glx 
           - mkdir -p /usr/share/man/man1mkdir -p /usr/share/man/man1
-          - apt-get -y install -f openjdk-11-jre-headless texlive-latex-extra
+          - apt-get -y install -f openjdk-11-jre-headless texlive-latex-extra dvipng
           - conda env update -n resultsanalysis --file environment.yml
           - conda activate resultsanalysis
           - cd ../