add git to cloud-init

[Sopor10]

Description

git is a prerequisite for the cloud-init script.
It's not present by default on every Cloud Provider Image.

Motivation and Context

This fixes Issue #160.

• I have raised an issue to propose this change this is required

How Has This Been Tested?

I created a faasd Server on Hetzner Cloud.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

Commits:

• I've read the CONTRIBUTION guide
• My commit message has a body and describe how this was tested and why it is required.
• I have signed-off my commits with git commit -s for the Developer Certificate of Origin (DCO)

Code:

• My code follows the code style of this project.
• I have added tests to cover my changes.

Docs:

• My change requires a change to the documentation.
• I have updated the documentation accordingly.

[derek]

Thank you for your contribution. I've just checked and your commit doesn't appear to be signed-off. That's something we need before your Pull Request can be merged. Please see our contributing guide.
Tip: if you only have one commit so far then run: git commit --amend --signoff and then git push --force.

[alexellis]

Approved

[alexellis]

Approved. You may also want to see our installation script which is in the readme. You can run that from cloud-init and it may be more resilient.