# Copyright 2024 Florian Beisel
# 
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
# 
#     http://www.apache.org/licenses/LICENSE-2.0
# 
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# Start from a base image with Go installed and C libraries needed for SQLite.
FROM golang:1.21-bookworm as builder

# Set the working directory.
WORKDIR /app

# Copy the go.mod and go.sum files first and download the modules. 
# This is to take advantage of Docker's cache layers.
COPY go.mod go.sum ./
RUN go mod download

# Copy the rest of the source code.
COPY . .

# Build the binary. CGO is enabled by default in the official Go images.
RUN go build -o app .

# Use Debian as the base for the runtime image as it includes necessary C libraries.
FROM debian:bookworm-slim

# Set the working directory in the container.
WORKDIR /root/

# Copy the binary from the builder stage.
COPY --from=builder /app/app .

# Copy the binary from the builder stage.
COPY --from=builder /app/db/migrations db/migrations

# Add any runtime dependencies here, if needed.

# Command to run the executable.
CMD ["./app"]