Don't need to install nextflow for docs

Author: samirelanduk

Dockerfile

@@ -1,13 +1,6 @@
 FROM sphinxdoc/sphinx as builder
 
-RUN apt-get clean all && apt-get update && apt-get dist-upgrade -y && apt-get upgrade
-RUN apt-get install --reinstall ca-certificates
-RUN mkdir -p /usr/share/man/man1 /usr/share/man/man2
-RUN apt-get install -y --no-install-recommends openjdk-11-jre
-RUN apt-get install curl -y
-RUN curl -L https://github.com/nextflow-io/nextflow/releases/download/v21.10.6/nextflow-21.10.6-all -o nextflow
-RUN chmod +x nextflow
-RUN mv nextflow /usr/local/bin
+RUN touch /usr/local/bin/nextflow && chmod +x /usr/local/bin/nextflow
 
 COPY ./ ./
 RUN rm -rf docs/build