# syntax=docker/dockerfile:experimental


#   Copyright 2020 Docker Compose CLI authors

#   Licensed under the Apache License, Version 2.0 (the "License");
#   you may not use this file except in compliance with the License.
#   You may obtain a copy of the License at

#       http://www.apache.org/licenses/LICENSE-2.0

#   Unless required by applicable law or agreed to in writing, software
#   distributed under the License is distributed on an "AS IS" BASIS,
#   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#   See the License for the specific language governing permissions and
#   limitations under the License.

FROM golang:1.15-alpine AS build
COPY main.go .
RUN --mount=type=cache,target=/go/pkg/mod \
    CGO_ENABLED=0 go build -trimpath -ldflags="-s -w" -o server main.go

FROM alpine
RUN apk --no-cache add curl
COPY --from=build /go/server /
CMD /server "${PORT:-80}" "${DIR:-/run/secrets}"