# syntax=docker/dockerfile:1

# Build stage
FROM golang:1.22-alpine AS builder
WORKDIR /app

# Copy go mod files and download dependencies
COPY go.mod go.sum ./
RUN go mod download

# Copy the rest of the application
COPY . .

# Build the application
RUN go build -o mqtt_presence_redis_go mqtt_presence_redis_go.go

# Runtime stage
FROM alpine:3.20
WORKDIR /app
COPY --from=builder /app/mqtt_presence_redis_go .

# Expose default MQTT port if needed
EXPOSE 1883

# Command to run the binary
CMD ["./mqtt_presence_redis_go"]