# Use the offical Golang image to create a build artifact.
# This is based on Debian and sets the GOPATH to /go.
# https://hub.docker.com/_/golang
FROM golang as builder

# Install dep
RUN go get -u github.com/golang/dep/cmd/dep

# Copy local code to the container image.
WORKDIR /go/src/github.com/knative/docs/hellosecrets
COPY . .

# Fetch dependencies
RUN dep init
RUN dep ensure

# Build the output command inside the container.
RUN CGO_ENABLED=0 GOOS=linux go build -v -o hellosecrets

# Use a Docker multi-stage build to create a lean production image.
# https://docs.docker.com/develop/develop-images/multistage-build/#use-multi-stage-builds
FROM alpine

# Enable the use of outbound https
RUN apk add --no-cache ca-certificates

# Copy the binary to the production image from the builder stage.
COPY --from=builder /go/src/github.com/knative/docs/hellosecrets/hellosecrets /hellosecrets

# Run the web service on container startup.
CMD ["/hellosecrets"]
