# Build stage
FROM golang:1.24.4-alpine AS builder

# Install build dependencies
RUN apk add --no-cache git

# Set working directory
WORKDIR /app

# Copy go mod files from root directory
COPY go.mod go.sum ./

# Download dependencies
RUN go mod download

# Copy source code from app directory
COPY app/ .

# Build the application
RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o authenticator authenticator.go

# Production stage
FROM alpine:latest

# Install ca-certificates for HTTPS
RUN apk --no-cache add ca-certificates

WORKDIR /root/

# Copy binary from builder
COPY --from=builder /app/authenticator .

# Copy config file
COPY --from=builder /app/etc/authenticator.yaml ./etc/

# Expose port
EXPOSE 8888

# Run the application
CMD ["./authenticator", "-f", "etc/authenticator.yaml"]