FROM golang:1.21-alpine AS builder

WORKDIR /app

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

COPY main.go ./
RUN go build -o sshserver main.go

FROM alpine:latest

RUN apk add --no-cache ca-certificates

COPY --from=builder /app/sshserver /usr/local/bin/sshserver

ENV COMMAND /app/tui

EXPOSE 22

CMD ["/usr/local/bin/sshserver"]