diff --git a/Dockerfile b/Dockerfile new file mode 100644 index 00000000..88d1de1c --- /dev/null +++ b/Dockerfile @@ -0,0 +1,40 @@ +# Use the official 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:1.14 as builder + +# Create and change to the app directory. +WORKDIR /app + +# Retrieve application dependencies using go modules. +# Allows container builds to reuse downloaded dependencies. +COPY go.* ./ +COPY go.mod ./ +COPY go.sum ./ +COPY .env ./ +COPY database.env ./ + +RUN go mod download + +# Copy local code to the container image. +COPY . ./ + +RUN CGO_ENABLED=0 go test -v + +# Build the binary. +# -mod=readonly ensures immutable go.mod and go.sum in container builds. +RUN CGO_ENABLED=0 GOOS=linux go build -mod=readonly -v -o server + +# Use the official Alpine image for a lean production container. +# https://hub.docker.com/_/alpine +# https://docs.docker.com/develop/develop-images/multistage-build/#use-multi-stage-builds +FROM alpine:3 +RUN apk add --no-cache ca-certificates + +# Copy the binary to the production image from the builder stage. +COPY --from=builder /app/server /server + +EXPOSE 8082 + +# Run the web service on container startup. +CMD ["/server"] \ No newline at end of file