Add "http_port_min" and "http_port_max" configuration for cloud-init

[cal0s93]

This issue requests the addition of two new variables, http_port_min and http_port_max, to all packer.json files in the project.

These variables will allow users to specify a port range for the HTTP service used by cloud-init during image creation.

Motivation:

Currently, the HTTP port used by cloud-init is hardcoded to 80. This can be a problem if the user wants to use a different port for security reasons or conflicts with other services.

Proposal:

Add the following two lines to all packer.json files:

"http_port_min": "{{user `http_port_min`}}",
"http_port_max": "{{user `http_port_max`}}",

Testing:

The modification has been successfully tested in the creation of a template on Proxmox by adding the lines to the packer.json file at line 22.

Impact:

This change will have a minimal impact on the project. The new variables will be optional, and existing functionality will remain the same for users who do not specify them.

Request:

Please review this issue and provide your comments or suggestions.