34 lines
1.0 KiB
Docker
34 lines
1.0 KiB
Docker
# Use the offical golang image to create a binary.
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# This is based on Debian and sets the GOPATH to /go.
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# https://hub.docker.com/_/golang
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FROM golang:1.16-buster as builder
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# Create and change to the app directory.
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WORKDIR /app
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# Retrieve application dependencies.
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# This allows the container build to reuse cached dependencies.
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# Expecting to copy go.mod and if present go.sum.
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COPY go.* ./
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RUN go mod download
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# Copy local code to the container image.
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COPY . ./
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# Build the binary.
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RUN go build -v -o server
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# Use the official Debian slim image for a lean production container.
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# https://hub.docker.com/_/debian
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# https://docs.docker.com/develop/develop-images/multistage-build/#use-multi-stage-builds
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FROM debian:buster-slim
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RUN set -x && apt-get update && DEBIAN_FRONTEND=noninteractive apt-get install -y \
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ca-certificates && \
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rm -rf /var/lib/apt/lists/*
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# Copy the binary to the production image from the builder stage.
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COPY --from=builder /app/server /app/server
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# Run the web service on container startup.
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CMD ["/app/server"]
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