🎉 Begin the project.

Dockerfile

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+FROM golang:latest AS builder
+WORKDIR /app
+
+# https://tailscale.com/kb/1118/custom-derp-servers/
+RUN go install tailscale.com/cmd/derper@main
+
+FROM alpine:latest
+WORKDIR /app
+
+RUN apk --no-cache add ca-certificates
+RUN mkdir /app/certs
+
+ENV DERP_DOMAIN example.com
+
+COPY --from=builder /go/bin/derper .
+
+EXPOSE 80 443 3478
+VOLUME ["/app/certs"]
+
+CMD /app/derper --hostname=$DERP_DOMAIN \
+    --certdir=/app/certs \
+    --verify-clients=true