# DEVELOPERS NOTE:
# THE PURPOSE OF THIS DOCKERFILE IS TO BUILD OUR MODULAR-MONOLITH
# EXECUTABLE IN A CONTAINER FOR A LINUX ENVIRONMENT USING A AMD64 PROCESSOR
# CHIPSET. WE PURPOSEFULLY CHOSE THIS ENVIRONMENT / CHIPSET BECAUSE THIS IS
# THE SAME AS OUR PRIVATE CLOUD HOSTING PROVIDER AS THE PURPOSE OF THIS
# CONTAINER IS TO RUN IN THEIR INFRASTRUCTURE.

###
### Build Stage
###

# The base go-image
FROM golang:1.24-alpine AS build-env

# Create a directory for the app
RUN mkdir /app

# Set working directory
WORKDIR /app

# Special thanks to speeding up the docker builds using steps (1) (2) and (3) via:
# https://stackoverflow.com/questions/50520103/speeding-up-go-builds-with-go-1-10-build-cache-in-docker-containers

# (1) Copy your dependency list
COPY go.mod go.sum ./

# (2) Install dependencies
RUN go mod download

# (3) Copy all files from the current directory to the `/app` directory which we are currently in.
COPY . .

# Run command as described:
# go build will build a 64bit Linux executable binary file named server in the current directory
RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -o maplepress-backend .

###
### Run stage.
###

FROM alpine:latest

# Set working directory
WORKDIR /app

# Copy only required data into this image
COPY --from=build-env /app/maplepress-backend .

# Copy all the static content necessary for this application to run.
COPY --from=build-env /app/static ./static

# Copy database migrations
COPY --from=build-env /app/migrations ./migrations

EXPOSE 8000

# Run the server executable
CMD [ "/app/maplepress-backend", "daemon"]