Add custom headscale dockerfile

headscale/Dockerfile

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+# Builder image
+FROM docker.io/golang:1.19.0-bullseye AS build
+ARG VERSION=v0.17.0-beta4
+ENV GOPATH /go
+
+RUN apt-get install -y git && \
+    git clone https://github.com/juanfont/headscale -b $VERSION /go/src/headscale
+
+WORKDIR /go/src/headscale
+
+RUN go mod download
+
+RUN CGO_ENABLED=0 GOOS=linux go install -tags ts2019 -ldflags="-s -w -X github.com/juanfont/headscale/cmd/headscale/cli.Version=$VERSION" -a ./cmd/headscale
+RUN strip /go/bin/headscale
+RUN test -e /go/bin/headscale
+
+# Production image
+# Note that we do not use "distroless" because we actually want to have a shell in the image
+# to run app.sh (in order to perform custom initialization)
+FROM docker.io/golang:1.19.0-bullseye
+
+COPY --from=build /go/bin/headscale /bin/headscale
+ENV TZ UTC
+
+ADD app.sh /
+
+RUN chmod +x /app.sh
+
+EXPOSE 8080/tcp
+# State path
+# Note that configuration should be mounted or added in /etc/headscale
+VOLUME /var/lib/headscale
+CMD ["/app.sh"]

headscale/app.sh

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+#!/bin/sh
+
+touch /var/lib/headscale/db.sqlite
+mkdir /var/lib/headscale/.cache
+exec headscale -c /etc/headscale/config.yaml serve