curling bash script from repo not permitted due to ssh-key not present

To curl the bash script we have to generate the ssh-key before:



Fix:

```
mkdir .ssh
vim .ssh/config
```
Modify with:

```
Host sapling
  ForwardAgent yes
  HostName sapling.stanford.edu
  User USERNAME
```
and then

```
eval $(ssh-agent)
ssh-keygen -t ed25519
ssh-add
ssh-copy-id sapling
ssh sapling