make_key.sh writing keys to current directory

[YashKumarVerma]

Describe the bug

• make_key.sh is a utility to create keys
• the application is hardcoded to look for keys in /keys directory. (i.e. /key/key.pub at here, here, here etc)
• running the utility script generates the keys in the directory from where it's called.
• So if someone does bash keys/make_key.sh, then the keys would be generated in the root folder / and not in /keys/.
• This can cause issues, as the readme also does not cover this case.

To Reproduce

• open repo root (/)
• run bash keys/make_key.sh
• keys would be generated in repo root (/) and not in /keys directory.

Expected behavior

• the keys must always be generated in the correct directory, irrespective of the location of the call.

Screenshots

• N/A

Desktop (please complete the following information):

• OS: Ubuntu 19.04

Additional context

• SheBang also missing.

[YashKumarVerma]

This has been fixed in #85