Dockerfile

# docker build -t pgasus .

# see https://link.medium.com/Ra2kvVysZ7
# investigate https://github.com/GoogleContainerTools/distroless later

FROM golang:1.17-alpine3.14 AS builder
RUN apk --no-cache add ca-certificates

COPY . /go/src/github.com/debackerl/pgasus
WORKDIR /go/src/github.com/debackerl/pgasus
# -w, strip DWARD debugging information to reduce size
# -s, strip the Go symbol table to reduce size
#RUN ls -lh . && go version && CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -a -installsuffix cgo -ldflags="-w -s" -o /bin/pgasus . && ls -lh /bin/pgasus
RUN ls -lh . && go version && GOOS=linux GOARCH=amd64 go build -ldflags="-w -s" -o /bin/pgasus . && ls -lh /bin/pgasus

RUN addgroup -S pgasus -g 1001 && \
    adduser -S pgasus -u 1001 -g pgasus

FROM alpine:3.14

WORKDIR /
COPY --from=builder /etc/group /etc/hostname /etc/hosts /etc/nsswitch.conf /etc/passwd /etc/services /etc/shadow /etc/ssl /etc/
COPY --from=builder /bin/pgasus /bin/pgasus

USER pgasus

CMD ["/bin/pgasus", "--config=/etc/pgasus.conf", "serve"]