Initial commit: Dockerfile, CI, README

.gitlab-ci.yml

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+stages:
+  - build
+
+build:
+  stage: build
+  image: docker:latest
+  services:
+    - docker:dind
+  before_script:
+    - docker login -u "$CI_REGISTRY_USER" -p "$CI_REGISTRY_PASSWORD" "$CI_REGISTRY"
+  script:
+    - docker build -t "$CI_REGISTRY_IMAGE:$CI_COMMIT_SHORT_SHA" -t "$CI_REGISTRY_IMAGE:latest" .
+    - docker push --all-tags "$CI_REGISTRY_IMAGE"
+  rules:
+    - if: $CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH

Dockerfile

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+FROM alpine:latest
+
+RUN apk add --no-cache \
+    curl \
+    docker-cli \
+    docker-cli-compose && \
+    wget -O /usr/local/bin/webhook \
+      https://github.com/adnanh/webhook/releases/download/2.8.2/webhook-linux-amd64 && \
+    chmod +x /usr/local/bin/webhook
+
+EXPOSE 9000
+ENTRYPOINT ["webhook"]

README.md

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+# nas-webhook
+
+Lightweight webhook container for NAS auto-deploy. Alpine-based with `docker-cli` and `docker-cli-compose` included so hooks can run `docker compose pull && docker compose up -d`.
+
+## Image
+
+```
+registry.gitlab.com/bgrolleman/nas-webhook:latest
+```
+
+## Usage
+
+See the [webhook documentation](https://github.com/adnanh/webhook) for hook configuration.
+
+Requires `/var/run/docker.sock` mounted to execute Docker commands from within the container.