Dockerfile

# Dockerfile source came from
# https://github.com/GoogleCloudPlatform/cloud-run-microservice-template-go/blob/main/Dockerfile

# Use the offical golang image to create a binary.
# This is based on Debian and sets the GOPATH to /go.
# https://hub.docker.com/_/golang
FROM golang:1.21

# Set destination for COPY
WORKDIR /app

# Download Go modules
COPY go.mod go.sum ./
RUN go mod download

# Copy the source code. Note the slash at the end, as explained in
# https://docs.docker.com/engine/reference/builder/#copy
COPY . ./

# Build
RUN go build -o /app-server

# Optional:
# To bind to a TCP port, runtime parameters must be supplied to the docker command.
# But we can document in the Dockerfile what ports
# the application is going to listen on by default.
# https://docs.docker.com/engine/reference/builder/#expose
EXPOSE 8080

# Run
CMD ["/app-server"]