add docker files for canu:1.6

src/nf_modules/canu/1.6/Dockerfile

+FROM ubuntu:18.04
+MAINTAINER Laurent Modolo
+
+ENV CANU_VERSION=1.6
+ENV PACKAGES canu=${CANU_VERSION}*
+
+RUN apt-get update && \
+    apt-get install -y --no-install-recommends ${PACKAGES} && \
+    apt-get clean

src/nf_modules/canu/1.6/docker_init.sh

+#!/bin/sh
+docker build src/nf_modules/canu/1.6 -t 'canu:1.6'