Dockerfile-optimized

### Stage 1 - Setting up binaries of Go Lang to be used in the next stage ###

# Use the official Ubuntu image as the base for this stage
FROM ubuntu AS build

# Update package list and install the Go programming language
RUN apt update && apt install -y golang

# Set the GO111MODULE environment variable to "off" to disable module support
ENV GO111MODULE=off

# Copy the current directory (including source code) into the build context
COPY . .

# Compile the Go application, disabling cgo, and place the binary in /app
RUN CGO_ENABLED=0 go build -o /app .

#############################################################################

## Stage 2 - Distroless Scratch image to serve our app

# Use a minimal "scratch" image as the base for this stage
FROM scratch

# Copy the compiled binary from the previous stage into the scratch stage
COPY --from=build /app /app

# Set the default command to run when a container starts, which is our /app binary
ENTRYPOINT [ "/app" ]