Dockerfile

# Multi-stage build for production deployment
FROM golang:1.24.3-alpine AS builder

# Set working directory
WORKDIR /app

# Copy go mod files
COPY api/go.mod api/go.sum ./

# Download dependencies
RUN go mod download

# Copy source code
COPY api/ ./

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

# Final stage
FROM alpine:latest

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

# Create non-root user
RUN adduser -D -s /bin/sh appuser

# Set working directory
WORKDIR /app

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

# Copy static files
COPY api/static ./static

# Note: .env file is not copied in production
# Environment variables are provided by Render platform

# Change ownership
RUN chown -R appuser:appuser /app

# Switch to non-root user
USER appuser

# Expose port (Render will set the PORT env var)
EXPOSE 3000

# Run the application
CMD ["./main"]