feat: replace date tag with git commit SHA and add version tag

Replace date-based Docker tags with git commit SHA and version from version file.
This improves traceability by linking images to specific commits and versions.

Makefile

@@ -81,6 +81,7 @@ $(DIRS):
 	# Build the image
 	@(cd $(IMAGES_PATH)/$@ && \
 	export DATE=$(DATE_TAG) && \
+	export VERSION=$$(cat version) && \
 	export OS_NAME=$$(echo $@ | cut -d'/' -f1) && \
 	export OS_VERSION_FULL=$$(echo $@ | cut -d'/' -f2) && \
 	export OS_IMAGE=$$(echo $@ | cut -d'/' -f3) && \

builds/docker.pkr.hcl

@@ -64,7 +64,7 @@ build {
   post-processors {
     post-processor "docker-tag" {
       repository = "${var.docker_server}/unkin/${var.os_name}${var.os_version_major}-${var.os_image}"
-      tags = ["latest", var.date]
+      tags = ["latest", var.git_commit, var.version]
     }
 
     dynamic "post-processor" {

library/variables.pkr.hcl

@@ -121,6 +121,11 @@ variable "git_branch" {
   type = string
   default = env("GIT_BRANCH")
 }
+variable "version" {
+  description = "The version from version file."
+  type = string
+  default = env("VERSION")
+}
 variable "include_incus_client_certs" {
   type    = bool
   default = false