Add poster generation to gitlab workflow

Change-Id: Ic262ffcaab5af8c103915bb79feaac4ad362d4fd
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 90f1772..0dc13c3 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -36,11 +36,13 @@
     - start_section install_r_packages "Installing missing R packages"
     - R -e "install.packages(c('RKorAPClient', 'httr', 'tidytext', 'httpuv', 'scales', 'sp', 'raster', 'kableExtra', 'DT', 'svglite'))"
     - R -e 'devtools::install_git("https://korap.ids-mannheim.de/gerrit/IDS-Mannheim/idsThemeR")'
+    - R -e 'devtools::install_git("https://korap.ids-mannheim.de/gerrit/IDS-Mannheim/posterdown")'
     - end_section install_r_packages
 
   script:
     - start_section render "Running scripts"
     - R_CACHE_ROOTPATH=./cache R -f ./R/icc_stats.R
     - R_CACHE_ROOTPATH=./cache R -e "require(rmarkdown); render('R/report.Rmd', output_format='html_document', output_dir='target')"
+    - R_CACHE_ROOTPATH=./cache R -e "require(rmarkdown); render('R/poster.Rmd', output_format='posterdown::posterdown_ids', output_dir='target')"
     - end_section render