feat(ci): move to Drone CI

.concourse/pipeline.yml

@@ -1,24 +0,0 @@
----
-resources:
-  - name: weekly
-    type: time
-    source:
-      interval: 168h
-  - name: ci-images.git
-    type: git
-    icon: github
-    source:
-      uri: https://code.icb4dc0.de/inetmock/ci-images.git
-
-jobs:
-  - name: go-ci
-    plan:
-      - in_parallel:
-        - get: weekly
-          trigger: true
-        - get: ci-images.git
-          trigger: true
-      - task: go-ci-image
-        file: ci-images.git/.concourse/tasks/go-ci.yml
-        input_mapping:
-          repo: ci-images.git

.concourse/tasks/go-ci.yml

@@ -1,25 +0,0 @@
----
-platform: linux
-
-image_resource:
-  type: registry-image
-  source:
-    repository: gcr.io/kaniko-project/executor
-    tag: debug
-
-inputs:
-  - name: repo
-    path: .
-
-params:
-  GITEA_USER: ((gitea-credentials.user))
-  GITEA_TOKEN: ((gitea-credentials.token))
-
-run:
-  path: sh
-  args:
-    - -cex
-    - |
-      echo "{\"auths\": {\"https://code.icb4dc0.de\": {\"auth\" : \"$(printf '%s:%s' $GITEA_USER $GITEA_TOKEN | base64)\" }}}" > /kaniko/.docker/config.json
-
-      /kaniko/executor --destination code.icb4dc0.de/inetmock/ci-images/go-ci:latest --context go-ci/

.drone.yml

@@ -0,0 +1,21 @@
+---
+kind: pipeline
+type: docker
+name: default
+
+steps:
+
+- name: go-ci
+  image: gcr.io/kaniko-project/executor:debug
+  network_mode: host
+  commands:
+    - >
+      echo "{\"auths\": {\"https://code.icb4dc0.de\": {\"auth\" : \"$(printf '%s:%s' $$GITEA_USER $$GITEA_TOKEN | base64)\" }}}" > /kaniko/.docker/config.json
+    - /kaniko/executor --destination "$${IMAGE_REPO}:$${IMAGE_TAG}" --context "$${BUILD_CONTEXT}"
+  environment:
+    GITEA_USER: prskr
+    GITEA_TOKEN:
+      from_secret: gitea_token
+    IMAGE_REPO: code.icb4dc0.de/inetmock/ci-images/go-ci
+    IMAGE_TAG: latest
+    BUILD_CONTEXT: go-ci/