feat(caddy): prepare caddy image

.concourse/pipeline.yml

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+---
+resources:
+- name: ci-images.git
+  type: git
+  icon: github
+  source:
+    uri: https://code.icb4dc0.de/prskr/ci-images.git
+
+- name: caddy-release
+  type: github-release
+  icon: github
+  source:
+    owner: caddyserver
+    repository: caddy
+
+jobs:
+  - name: images
+    plan:
+      - get: ci-images.git
+        trigger: true
+      - get: caddy-release
+        trigger: true
+        params:
+          globs:
+            - caddy_*_linux_amd64.tar.gz
+      - task: caddy
+        file: ci-images.git/.concourse/tasks/caddy.yml
+        input_mapping:
+          repo: ci-images.git
+          caddy: caddy-release

.concourse/tasks/caddy.yml

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+---
+platform: linux
+
+image_resource:
+  type: registry-image
+  source:
+    repository: gcr.io/kaniko-project/executor
+    tag: debug
+
+inputs:
+  - name: repo
+    path: .
+  - name: caddy
+    path: caddy/caddy-release
+
+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/prskr/ci-images/caddy:latest --context caddy/

caddy/.gitignore

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+caddy-release/

caddy/Dockerfile

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+FROM gcr.io/distroless/static
+
+ADD caddy-release/caddy_*_linux_amd64.tar.gz /usr/local/caddy
+COPY config/caddy.json /etc/caddy/caddy.json
+
+EXPOSE 3000
+
+ENTRYPOINT [ "/usr/local/caddy/caddy" ]
+CMD [ "run", "--config=/etc/caddy/caddy.json" ]

caddy/config/caddy.json

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+{
+  "apps": {
+    "http": {
+      "servers": {
+        "static": {
+          "listen": [
+            ":3000"
+          ],
+          "metrics": {},
+          "routes": [
+            {
+              "handle": [
+                {
+                  "handler": "file_server",
+                  "root": "/usr/share/caddy",
+                  "index_names": [
+                    "index.html"
+                  ]
+                }
+              ]
+            }
+          ]
+        },
+        "metrics": {
+          "listen": [
+            ":9100"
+          ],
+          "routes": [
+            {
+              "handle": [
+                {
+                  "handler": "metrics"
+                }
+              ]
+            }
+          ]
+        }
+      }
+    }
+  }
+}