add docker files for SRAtoolkit:2.8.2

src/nf_modules/SRAtoolkit/2.8.2/Dockerfile

+FROM ubuntu:18.04
+MAINTAINER Laurent Modolo
+
+ENV SRATOOLKIT_VERSION=2.8.2
+ENV PACKAGES sra-toolkit=${SRATOOLKIT_VERSION}*
+
+RUN apt-get update && \
+    apt-get install -y --no-install-recommends ${PACKAGES} && \
+    apt-get clean

src/nf_modules/SRAtoolkit/2.8.2/docker_init.sh

+#!/bin/sh
+docker build src/nf_modules/SRAtoolkit/2.8.2 -t 'sratoolkit:2.8.2'