Dockerfile

# Build stage
FROM golang:1.23-alpine AS builder

# Install build dependencies
RUN apk add --no-cache git gcc musl-dev sqlite-dev

# Set working directory
WORKDIR /app

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

# Download dependencies
RUN go mod download

# Copy source code
COPY . .

# Build the application
RUN CGO_ENABLED=1 GOOS=linux go build -a -installsuffix cgo -o main ./cmd/staticsend

# Production stage
FROM alpine:latest

# Install runtime dependencies
RUN apk --no-cache add ca-certificates sqlite tzdata aws-cli curl

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

# Set working directory
WORKDIR /app

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

# Copy static files and templates
COPY --chown=appuser:appgroup static/ ./static/
COPY --chown=appuser:appgroup templates/ ./templates/
COPY --chown=appuser:appgroup migrations/ ./migrations/

# Copy backup script
COPY --chown=appuser:appgroup backup.sh ./backup.sh
RUN chmod +x /app/backup.sh

# Create data directory for SQLite database with proper permissions
RUN mkdir -p /app/data && \
    chown -R appuser:appgroup /app/data && \
    chmod -R 755 /app/data

# 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 ["./main"]