Dockerfile

# Copyright 2020 Google LLC
#
# 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.

# Define a default value so it's not empty if the builder fails to provide it
ARG BUILDPLATFORM=linux/amd64

FROM --platform=$BUILDPLATFORM golang:1.26.1-alpine@sha256:2389ebfa5b7f43eeafbd6be0c3700cc46690ef842ad962f6c5bd6be49ed82039 AS builder
ARG TARGETOS=linux
ARG TARGETARCH=amd64
WORKDIR /src

# restore dependencies
COPY go.mod go.sum ./
RUN go mod download
COPY . .

# Skaffold passes in debug-oriented compiler flags
ARG SKAFFOLD_GO_GCFLAGS
RUN GOOS=${TARGETOS} GOARCH=${TARGETARCH} CGO_ENABLED=0 go build -ldflags="-s -w" -gcflags="${SKAFFOLD_GO_GCFLAGS}" -o /go/bin/frontend .

FROM gcr.io/distroless/static
WORKDIR /src
COPY --from=builder /go/bin/frontend /src/server
COPY ./templates ./templates
COPY ./static ./static

# Definition of this variable is used by 'skaffold debug' to identify a golang binary.
# Default behavior - a failure prints a stack trace for the current goroutine.
# See https://golang.org/pkg/runtime/
ENV GOTRACEBACK=single

EXPOSE 8080
ENTRYPOINT ["/src/server"]