Swap to jerryjvl build repo

Dockerfile

@@ -1,18 +1,7 @@
-FROM jekyll/minimal:latest
-LABEL version="1.2.0"
-LABEL description="Minimal Jekyll image with basic build tools."
-LABEL maintainer="Vivien Richter <vivien-richter@outlook.de>"
-
-# Requirements
+# This image is cached on the Github Actions VM, so it drastically reduces build time
+FROM jekyll/builder:latest
 USER root
-RUN apk --no-cache add build-base
-EXPOSE 4000/tcp
 
-# Entry point
 COPY entrypoint.sh /entrypoint.sh
-COPY ./ /
-
-RUN chmod +x /entrypoint.sh
-RUN chmod +w /
 
 ENTRYPOINT ["/entrypoint.sh"]