chore: use context instead of Dockerfile

.forgejo/workflows/build-images.yaml

@@ -16,7 +16,7 @@ on:
         required: false
 
 jobs:
-  # 1) Find all Dockerfiles under apps/* OR use the user-specified Dockerfile
+  # Find all Dockerfiles under apps/* OR use the user-specified Dockerfile
   discover-dockerfiles:
     runs-on: ci-os
     outputs:
@@ -53,7 +53,7 @@ jobs:
 
         echo "dockerfiles=$json" >> "$GITHUB_OUTPUT"
 
-  # 2) For each Dockerfile discovered, build & push with Kaniko
+  # For each Dockerfile discovered, build & push with Kaniko
   build-and-push:
     runs-on: ci-os
     needs: discover-dockerfiles
@@ -66,8 +66,8 @@ jobs:
     - name: Checkout
       uses: actions/checkout@v4
 
-    - id: set-image
+    - id: set-image-and-context
-      name: Determine Image Name
+      name: Determine Image Name and Context
       run: |
         # If the user provided a container image name, use it
         if [ -n "${{ github.event.inputs.image }}" ]; then
@@ -79,12 +79,17 @@ jobs:
           echo "image=$image" >> "$GITHUB_OUTPUT"
         fi
 
+        # Derive the context directory from the Dockerfile path
+        # e.g. "apps/ci-os/Dockerfile" => "apps/ci-os"
+        context_dir=$(dirname "${{ matrix.dockerfile }}")
+        echo "context_dir=$context_dir" >> "$GITHUB_OUTPUT"
+
     - name: Build and Push with Kaniko
       uses: https://code.252.no/pub/kaniko-action@latest
       with:
-        context: ./
+        # Kaniko will look for a file named "Dockerfile" by default.
-        docker_file: ${{ matrix.dockerfile }}
+        context: ${{ steps.set-image-and-context.outputs.context_dir }}
-        destinations: "code.252.no/${{ github.repository }}/${{ steps.set-image.outputs.image }}:latest"
+        destinations: "code.252.no/${{ github.repository }}/${{ steps.set-image-and-context.outputs.image }}:latest"
         credentials: "code.252.no=tommy:${{ secrets.REGISTRY_TOKEN }}"
         push: "true"
         cache: "false"