hide src/* files not necessary for users

src/.docker_modules/cutadapt/2.1/Dockerfile

src/.docker_modules/cutadapt/2.1/docker_init.sh

src/.docker_modules/deeptools/3.0.2/Dockerfile

src/.docker_modules/deeptools/3.0.2/docker_init.sh

src/.docker_modules/deeptools/3.1.1/Dockerfile

src/.docker_modules/deeptools/3.1.1/docker_init.sh

src/.docker_modules/docker_push.sh

src/.docker_modules/docker_update.sh

src/.docker_modules/fastp/0.19.7/Dockerfile

src/.docker_modules/fastp/0.19.7/docker_init.sh

src/.docker_modules/fastqc/0.11.5/Dockerfile

src/.docker_modules/fastqc/0.11.5/docker_init.sh

src/.docker_modules/file_handle/0.1.1/Dockerfile

src/.docker_modules/file_handle/0.1.1/docker_init.sh

src/.docker_modules/gatk/4.0.8.1/Dockerfile

src/.docker_modules/gatk/4.0.8.1/docker_init.sh

src/.docker_modules/hisat2/2.0.0/Dockerfile

src/.docker_modules/hisat2/2.0.0/docker_init.sh

src/.docker_modules/hisat2/2.1.0/Dockerfile

src/.docker_modules/hisat2/2.1.0/docker_init.sh