Dockerfile

# Build stage
FROM golang:1.22-alpine AS builder

# 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=0 GOOS=linux go build -a -installsuffix cgo -o alert-dispatcher .

# Final stage
FROM alpine:latest

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

WORKDIR /app

# Copy the binary from builder stage
COPY --from=builder /app/alert-dispatcher /app/alert-dispatcher

# Make it executable with full permissions
RUN chmod 777 /app/alert-dispatcher

# Expose port
EXPOSE 8088

# Health check
HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
    CMD wget --no-verbose --tries=1 --spider http://localhost:8088/health || exit 1

# Run the application
CMD ["/app/alert-dispatcher"]