FROM golang:1.22-alpine AS builder
WORKDIR /app
COPY go.mod go.sum ./
RUN go mod download
COPY main.go .
RUN CGO_ENABLED=0 go build -o aisstream .

FROM alpine:3.20
RUN apk add --no-cache ca-certificates tzdata
COPY --from=builder /app/aisstream /usr/local/bin/aisstream
CMD ["aisstream"]