FROM golang:1.23-alpine AS builder

WORKDIR /build

# Install git for fetching dependencies
RUN apk add --no-cache git

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

# Download dependencies
RUN go mod download || true

# Copy source
COPY . .

# Tidy and download any missing deps
RUN go mod tidy

# Build
RUN CGO_ENABLED=0 GOOS=linux go build -ldflags="-s -w" -o /app/server ./cmd/server

# Runtime
FROM alpine:3.21

RUN apk --no-cache add ca-certificates tzdata

WORKDIR /app
COPY --from=builder /app/server .

EXPOSE 8080

ENTRYPOINT ["/app/server"]