Adds the packer block and a packer init step to the Packer example.
Rationale: a future version of Packer will remove bundled plugins from the packer binary. The recommended approach is to use the required_plugins block and run packer init.
Several version bumps and other updates:
Bump Packer to v1.9.1 (latest at time of this PR)
Bump the build image a supported version of Alpine (3.18)
Fix the source image family in the example, from ubuntu-2104 (nonexistent) to ubuntu-2204-lts
Adds the
packerblock and apacker initstep to the Packer example.Rationale: a future version of Packer will remove bundled plugins from the
packerbinary. The recommended approach is to use therequired_pluginsblock and runpacker init.Several version bumps and other updates:
ubuntu-2104(nonexistent) toubuntu-2204-lts