Issues with the B2SAFE deployment instructions

[alahiff]

In the intialization step this line is wrong:

$com run b2safe /install

as there is no comand /install inside the container.:

Error response from daemon: OCI runtime create failed: container_linux.go:344: starting container process caused "exec: \"/install\": stat /install: no such file or directory": unknown

It seems that it should be /init instead.

Also, the /init_certificates script fails with this error:

Privilege acquired
mkdir: cannot create directory '/opt/certificates': Permission denied

This can be fixed by replacing this line:

mkdir -p $certdir && sudo chown $IRODS_USER /opt/certificates

with:

sudo mkdir -p $certdir && sudo chown $IRODS_USER /opt/certificates