Dockerfile

# Build stage
FROM golang:1.25-alpine AS builder

# Set working directory
WORKDIR /app

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

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

# Download dependencies
RUN go mod download

# Copy source code
COPY . .

# Build the application
RUN make build-prod

# Final stage
FROM alpine:latest

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

# Create non-root user
RUN addgroup -g 1001 -S appgroup && \
    adduser -u 1001 -S appuser -G appgroup

WORKDIR /app

# Copy binary from builder stage
COPY --from=builder /app/build/node-dashboard-linux /app/node-dashboard

# Change ownership to non-root user
RUN chown -R appuser:appgroup /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/ || exit 1

# Run the application
ENTRYPOINT ["/app/node-dashboard"]