Make Docker image labels dynamic based on repository

Add GITHUB_REPOSITORY variable and use it in OCI labels so GitHub
correctly associates the package with the right repository.

This fixes the issue where chaptersix/temporal-cli images were being
associated with temporalio/cli repository.

Author: chaptersix

.github/docker/docker-bake.hcl

@@ -10,6 +10,10 @@ variable "IMAGE_NAME" {
   default = "temporal"
 }
 
+variable "GITHUB_REPOSITORY" {
+  default = "temporalio/cli"
+}
+
 variable "IMAGE_SHA_TAG" {}
 
 variable "IMAGE_BRANCH_TAG" {}
@@ -46,8 +50,8 @@ target "cli" {
   labels = {
     "org.opencontainers.image.title" = "temporal"
     "org.opencontainers.image.description" = "Temporal CLI"
-    "org.opencontainers.image.url" = "https://github.com/temporalio/cli"
-    "org.opencontainers.image.source" = "https://github.com/temporalio/cli"
+    "org.opencontainers.image.url" = "https://github.com/${GITHUB_REPOSITORY}"
+    "org.opencontainers.image.source" = "https://github.com/${GITHUB_REPOSITORY}"
     "org.opencontainers.image.licenses" = "MIT"
     "org.opencontainers.image.revision" = "${CLI_SHA}"
     "org.opencontainers.image.created" = timestamp()

.github/workflows/build-and-publish.yml

@@ -194,6 +194,7 @@ jobs:
           IMAGE_REPO: ${{ steps.meta.outputs.image_repo }}
           IMAGE_NAMESPACE: ${{ steps.meta.outputs.image_namespace }}
           IMAGE_NAME: ${{ steps.meta.outputs.image_name }}
+          GITHUB_REPOSITORY: ${{ github.repository }}
 
       - name: Build Docker image
         if: ${{ !inputs.publish }}
@@ -210,3 +211,4 @@ jobs:
           IMAGE_REPO: ${{ steps.meta.outputs.image_repo }}
           IMAGE_NAMESPACE: ${{ steps.meta.outputs.image_namespace }}
           IMAGE_NAME: ${{ steps.meta.outputs.image_name }}
+          GITHUB_REPOSITORY: ${{ github.repository }}