Dockerfile.dev

# Development Dockerfile - uses Alpine for shell access and healthcheck support
# For production, use Dockerfile (distroless)
FROM golang:1.26-alpine AS builder

WORKDIR /app

RUN apk add --no-cache \
    ca-certificates \
    git \
    tzdata \
    && update-ca-certificates

WORKDIR /tracer

# Copy only go.mod and go.sum first to cache dependencies
COPY go.mod go.sum ./

RUN go mod download

COPY . .

ARG TARGETPLATFORM
SHELL ["/bin/ash", "-o", "pipefail", "-c"]
RUN CGO_ENABLED=0 GOOS=linux GOARCH=$(echo $TARGETPLATFORM | cut -d'/' -f2) go build -a -tags netgo -ldflags '-w -extldflags "-static"' -o /app/tracer ./cmd/app

# Development image with Alpine (shell + wget for healthcheck)
FROM alpine:3.23 AS dev

ARG SERVER_PORT=8080
ENV SERVER_PORT=${SERVER_PORT}

WORKDIR /app

RUN apk add --no-cache \
    ca-certificates \
    tzdata \
    && update-ca-certificates

# Create non-root user for security
RUN addgroup -g 1000 tracer && \
    adduser -u 1000 -G tracer -s /bin/sh -D tracer

COPY --from=builder /app/tracer /app/tracer
COPY --from=builder /tracer/migrations /app/migrations

# Set ownership
RUN chown -R tracer:tracer /app

# Switch to non-root user
USER tracer

EXPOSE ${SERVER_PORT} 7001

# Health check using wget to verify app readiness (wget is included in Alpine base image)
# interval: check every 30 seconds
# timeout: wait up to 10 seconds for response
# start-period: wait 40 seconds before first check (app startup time)
# retries: mark unhealthy after 3 consecutive failures
HEALTHCHECK --interval=30s --timeout=10s --start-period=40s --retries=3 \
    CMD wget --no-verbose --tries=1 --spider http://localhost:${SERVER_PORT}/ready || exit 1

ENTRYPOINT ["/app/tracer"]