FROM docker.io/library/golang:1.23-alpine AS builder
WORKDIR /build
COPY go.mod ./
RUN go mod download || true
COPY signaling-server.go .
RUN go mod tidy && CGO_ENABLED=0 GOOS=linux go build -ldflags="-s -w" -o /webrtc-bridge .

FROM docker.io/library/alpine:3.20
RUN apk add --no-cache ca-certificates
COPY --from=builder /webrtc-bridge /usr/local/bin/webrtc-bridge
COPY client/ /app/client/
EXPOSE 8080
ENTRYPOINT ["webrtc-bridge"]