opendtu-logger/Dockerfile

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# Use buildx for multi-architecture support
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FROM --platform=${BUILDPLATFORM} golang:1.23 AS builder
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WORKDIR /app
# Copy go.mod and go.sum files to download dependencies
COPY go.mod go.sum ./
RUN go mod download
# Copy the source code into the container
COPY . .
# Build the application for the specified target architecture
# https://www.docker.com/blog/faster-multi-platform-builds-dockerfile-cross-compilation-guide/
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# Declare TARGETOS and TARGETARCH in the local scope so they can be used in the build stage.
ARG TARGETOS TARGETARCH
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RUN CGO_ENABLED=0 GOOS=${TARGETOS} GOARCH=${TARGETARCH} go build -o opendtu-logger .
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# Create a minimal runtime image
FROM --platform=${TARGETPLATFORM} scratch
WORKDIR /app
# Copy the executable from the builder stage
COPY --from=builder /app/opendtu-logger /app/opendtu-logger
COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
# Run the application
CMD ["./opendtu-logger"]