it has to be dockerfile?

.gitignore

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+.project

Dockerfile

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+FROM debian:stable-slim
+
+RUN apt-get update && apt-get install -y \
+	procps build-essential dpkg-dev dpkg-cross \
+	devscripts make && \
+	apt-get clean -y && \ 
+	rm -rf /var/lib/apt/lists/* && \
+	rm -rf /var/cache/apt/*
+

tekton-debian-kernel-build-image.yaml

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+apiVersion: tekton.dev/v1alpha1
+kind: PipelineResource
+metadata:
+  name: debian-kernel-build-git
+spec:
+  type: git
+  params:
+    - name: revision
+      value: master
+    - name: url
+      value: http://git-ui.lan/chaos/kernel-configs.git
+---
+apiVersion: tekton.dev/v1alpha1
+kind: PipelineResource
+metadata:
+  name: debian-kernel-build-image
+spec:
+  type: image
+  params:
+    - name: url
+      value: docker-registry.lan/debian-kernel-build-stable
+    - name: 
+---
+apiVersion: tekton.dev/v1beta1
+kind: Task
+metadata:
+  name: build-debian-kernel-build-from-source
+spec:
+  params:
+    - name: pathToContainerFile
+      type: string
+      description: The path to the dockerfile to build
+      default: $(resources.inputs.container-source.path)/Dockerfile
+    - name: pathToContext
+      type: string
+      description: |
+        The build context used by Kaniko
+        (https://github.com/GoogleContainerTools/kaniko#kaniko-build-contexts)
+      default: $(resources.inputs.container-source.path)
+  resources:
+    inputs:
+      - name: container-source
+        type: git
+    outputs:
+      - name: builtImage
+        type: image
+  steps:
+    - name: debug-print
+      image: busybox
+      command:
+        - echo
+      args:
+        - ockerfile: $(params.pathToContainerFile)
+        - contextPath: $(params.pathToContext)
+    - name: build-and-push
+      image: gcr.io/kaniko-project/executor:arm64
+      # specifying DOCKER_CONFIG is required to allow kaniko to detect docker credential
+      env:
+        - name: "DOCKER_CONFIG"
+          value: "/tekton/home/.docker/"
+      command:
+        - /kaniko/executor
+      args:
+        - --dockerfile=$(params.pathToContainerFile)
+        - --destination=$(resources.outputs.builtImage.url)
+        - --context=$(params.pathToContext)
+        - --skip-tls-verify
+---
+apiVersion: tekton.dev/v1beta1
+kind: TaskRun
+metadata:
+  name: build-container-image-from-git-source-task-run
+spec:
+  #serviceAccountName: dockerhub-service
+  taskRef:
+    name: build-debian-kernel-build-from-source
+  params:
+    - name: pathToContainerFile
+      value: Dockerfile
+  resources:
+    inputs:
+      - name: container-source
+        resourceRef:
+          name: debian-kernel-build-git
+    outputs:
+      - name: builtImage
+        resourceRef:
+          name: debian-kernel-build-image
+          
+          
+