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Dockerfile
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# Base build image
FROM golang:1.12-alpine AS build_base
# Install some dependencies needed to build the project
RUN apk add bash ca-certificates git gcc g++ libc-dev
WORKDIR /home/digidoc
# Force the go compiler to use modules
ENV GO111MODULE=on
# We want to populate the module cache based on the go.{mod,sum} files.
COPY go.mod .
COPY go.sum .
# This is the ‘magic’ step that will download all the dependencies that are specified in
# the go.mod and go.sum file.
# Because of how the layer caching system works in Docker, the go mod download
# command will _ only_ be re-run when the go.mod or go.sum file change
# (or when we add another docker instruction this line)
RUN go mod download
# This image builds the digidoc server
FROM build_base AS server_builder
# Here we copy the rest of the source code
COPY . .
# And compile the project
RUN CGO_ENABLED=1 GOOS=linux GOARCH=amd64 go install -a -tags netgo -ldflags '-w -extldflags "-static"' .
#In this last stage, we start from a fresh Alpine image, to reduce the image size and not ship the Go compiler in our production artifacts.
FROM alpine AS digidoc
# We add the certificates to be able to verify remote digidoc instances
RUN apk add ca-certificates curl
# Finally we copy the statically compiled Go binary.
COPY --from=server_builder /go/bin/digidoc ./build/digidoc
COPY ./email/templates ./email/templates
COPY ./location/data ./location/data
EXPOSE 8080
HEALTHCHECK --interval=5m --timeout=3s \
CMD curl -f ${DIGIDOC_DB_HOST}:${DIGIDOC_DB_PORT} || exit 1
ENTRYPOINT ["./build/digidoc server start"]