DockerFile.dev

# --- Stage 1: Build the binary ---
FROM golang:1.26-alpine AS builder

# Set the working directory inside the container
WORKDIR /app

# Copy the package management files first to leverage Docker caching
COPY go.mod go.sum ./
RUN go mod download

# Copy the remaining application source code
COPY . .

# Build the binary 
RUN GOOS=linux go build -o main .

# --- Stage 2: Final lightweight execution environment ---
FROM alpine:3.19

# Add a non-root user for security purposes
RUN adduser -D appuser
USER appuser

# Set working directory
WORKDIR /app

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

# Expose the port your application listens on (e.g., 8080)
EXPOSE 8080

# Run the binary - this will be override in docker compose
CMD ["./main"]