are we on alpine?

.woodpecker.yml

@@ -6,7 +6,7 @@ pipeline:
       - HTML_PATH=${CI_REPO_NAME}.html
       - EPUB_PATH=${CI_REPO_NAME}.epub
     commands:
-      - apt update && apt install -y curl
+      - apk update && apk add curl
       - mkdir dist
       - pandoc metadata.txt README.md -o dist/${HTML_PATH} -s --toc --css=style.css --self-contained --metadata title=$CI_PROJECT_NAME
       - pandoc metadata.txt README.md -o dist/${EPUB_PATH} -s --toc --css=style.css
@@ -22,7 +22,7 @@ pipeline:
     environment:
       - PDF_PATH=${CI_REPO_NAME}.pdf
     commands:
-      - apt-get update && apt-get install -y curl
+      - apk update && apk add curl
       - mkdir dist
       - xelatex --shell-escape -interaction=nonstopmode main.tex
       - cp main.pdf dist/${PDF_PATH}