Context toegevoegd voor GH action

Author: Programeerik

.github/workflows/azure-container-webapp.yml

@@ -62,6 +62,7 @@ jobs:
       - name: Build and push container image to registry
         uses: docker/build-push-action@0565240e2d4ab88bba5387d719585280857ece09 # v5.0.0
         with:
+          context: ./ShowcaseProject
           push: true
           tags: ghcr.io/${{ env.REPO }}:${{ github.sha }}
           file: ./ShowcaseProject/ShowcaseFrontend/Dockerfile