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Dockerfile
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FROM golang:1.20-alpine as builder
RUN apk update && apk add --no-cache gcc git
ENV USER=appuser
ENV UID=10001
RUN adduser \
--disabled-password \
--gecos "" \
--home "/nonexistent" \
--shell "/sbin/nologin" \
--no-create-home \
--uid "${UID}" \
"${USER}"
WORKDIR $GOPATH/src/github.com/ph4r5h4d/wait4it
COPY . .
RUN go mod download
RUN go mod verify
RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -ldflags="-w -s" -o /go/bin/wait4it
RUN chown appuser:appuser /go/bin/wait4it
FROM scratch
COPY --from=builder /etc/passwd /etc/passwd
COPY --from=builder /etc/group /etc/group
COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
COPY --from=builder /go/bin/wait4it /go/bin/wait4it
USER appuser:appuser
ENTRYPOINT ["/go/bin/wait4it"]