FROM golang:1.20-alpine AS build_deps

RUN apk add --no-cache git

WORKDIR /workspace
ENV GO111MODULE=on

COPY src/go.mod .
COPY src/go.sum .

RUN go mod download

FROM build_deps AS build

COPY src .

RUN CGO_ENABLED=0 go build -o webhook -ldflags '-w -extldflags "-static"' .

FROM alpine:3.17

RUN apk add --no-cache ca-certificates

COPY --from=build /workspace/webhook /usr/local/bin/webhook

ENTRYPOINT ["webhook"]