Dockerfile

# Build stage
FROM golang:1.25-alpine AS builder

# Install git and ca-certificates
RUN apk add --no-cache git ca-certificates

# Set working directory
WORKDIR /app

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

# Download dependencies
RUN go mod download

# Copy source code
COPY . .

# Generate swagger docs
RUN go install github.com/swaggo/swag/cmd/swag@latest
RUN swag init -g cmd/server/main.go

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

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

# Copy swagger docs
COPY --from=builder /app/docs ./docs

# Copy migrations
COPY --from=builder /app/migrations ./migrations

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

# Switch to non-root user
USER appuser

# Expose port
EXPOSE 8080

# Health check
HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
  CMD wget --no-verbose --tries=1 --spider http://localhost:8080/health || exit 1

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