Use our standardised container-image workflow

.github/workflows/container-image.yml

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+name: Container Image
+
+on:
+  push:
+    branches:
+      - main
+  pull_request: {}
+  release:
+    types:
+      - published
+
+jobs:
+  container-image:
+    # Required by the base Container Image Action [^1].
+    # [^1]: https://github.com/Icinga/github-actions/blob/main/.github/workflows/container-image.yml#L54-L58
+    permissions:
+      contents: read
+      packages: write
+      attestations: write
+      id-token: write
+
+    name: Build and Public Container Image
+    uses: icinga/github-actions/.github/workflows/container-image.yml@main
+    with:
+      documentation_url: https://icinga.com/docs/icinga-notifications
+    secrets:
+      dockerhub_username: ${{ secrets.DOCKERHUB_USERNAME }}
+      dockerhub_token: ${{ secrets.DOCKERHUB_TOKEN }}

Containerfile

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+# Icinga Notifications | (c) 2023 Icinga GmbH | GPLv2+
+
+FROM docker.io/library/golang AS base
+
+WORKDIR /icinga-notifications
+COPY go.mod go.sum ./
+RUN --mount=type=cache,target=/go/pkg/mod \
+	go mod download
+
+FROM base AS build
+
+# The source code must be mounted in read-write mode to allow the makefile to temporarily create the build artifacts
+# in the source directory. These artifacts will then directly be deleted after the build process is finished.
+RUN --mount=type=bind,source=.,target=.,rw \
+	--mount=type=cache,target=/go/pkg/mod \
+    --mount=type=cache,target=/root/.cache/go-build \
+    CGO_ENABLED=0 make all && \
+    make test && \
+    make DESTDIR=/target install && \
+    make clean
+
+FROM docker.io/library/alpine AS runtime
+
+COPY --from=build /target /
+
+RUN apk add tzdata
+
+ARG username=notifications
+RUN addgroup -g 1000 $username
+RUN adduser -u 1000 -H -D -G $username $username
+USER $username
+
+EXPOSE 5680
+CMD ["/usr/sbin/icinga-notifications"]

doc/02-Installation.md.d/For-Container.md

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+# Installing Icinga Notifications in Containers
+
+This image integrates Icinga Notifications into your containerized environment.
+
+## Usage
+
+TODO...