Dockerfile

FROM --platform=${BUILDPLATFORM} docker.io/golang:1.23.6-alpine@sha256:2c49857f2295e89b23b28386e57e018a86620a8fede5003900f2d138ba9c4037 AS build

ARG TARGETOS
ARG TARGETARCH
ARG VERSION

# needed for vcs feature introduced in go 1.18+
RUN apk add --no-cache git

WORKDIR /src

# Allow for caching
COPY go.mod go.sum ./
RUN go mod download

COPY / .

RUN CGO_ENABLED=0 GOOS=${TARGETOS} GOARCH=${TARGETARCH} \
  go build -a -ldflags "-s -w -X github.com/target/flottbot/version.Version=${VERSION}" \
  -o flottbot ./cmd/flottbot

FROM docker.io/alpine:3.21.2@sha256:56fa17d2a7e7f168a043a2712e63aed1f8543aeafdcee47c58dcffe38ed51099

ENV USERNAME=flottbot
ENV GROUP=flottbot
ENV UID=900
ENV GID=900

RUN apk add --no-cache ca-certificates curl jq && mkdir config && \
  addgroup -g "$GID" -S "$GROUP" && adduser -S -u "$UID" -G "$GROUP" "$USERNAME"

COPY --from=build /src/flottbot /flottbot

EXPOSE 3000 4000 8080

USER ${USERNAME}
CMD [ "/flottbot" ]