chore: only build the container when needed

Replaced broad glob patterns with specific source code and configuration
paths. This ensured the workflow only triggered on changes relevant to
the container image build process.

Signed-off-by: Chmouel Boudjnah <chmouel@redhat.com>

Author: chmouel

.github/workflows/container.yaml

@@ -3,13 +3,23 @@ name: Create and publish a Docker image to ghcr on main and nightly with ko
 on:
   push:
     paths:
-      - "**.go"
-      - "**.yaml"
+      - "cmd/**"
+      - "pkg/**"
+      - "vendor/**"
+      - "go.mod"
+      - "go.sum"
+      - ".ko.yaml"
+      - ".github/workflows/container.yaml"
   # For testing when pushing to the main repo directly on pr
   # pull_request:
   #   paths:
-  #     - "**.go"
-  #     - "**.yaml"
+  #     - "cmd/**"
+  #     - "pkg/**"
+  #     - "vendor/**"
+  #     - "go.mod"
+  #     - "go.sum"
+  #     - ".ko.yaml"
+  #     - ".github/workflows/container.yaml"
 env:
   PLATFORMS: linux/amd64,linux/arm64,linux/ppc64le