FROM golang:1.20-alpine AS builder
WORKDIR /app

COPY go.mod go.sum ./
RUN go mod download

COPY . .
RUN CGO_ENABLED=0 GOOS=linux go build -o sender main.go

FROM alpine:latest
WORKDIR /root/
COPY --from=builder /app/sender .
COPY public ./public

EXPOSE 3000
CMD ["./sender"]