FROM node:16-alpine3.15 AS frontend-builder
COPY frontend/ /app
RUN apk add --update python3 make g++ && cd /app && npm install && npm run build

FROM golang:1.17.3-buster AS backend-builder
RUN go install github.com/gobuffalo/packr/v2/packr2@latest
COPY --from=frontend-builder /app/static /app/frontend/static
COPY backend/ /app
ARG TARGETARCH
RUN cd /app && packr2 && env CGO_ENABLED=1 GOOS=linux GOARCH=${TARGETARCH} go build -a -tags netgo -ldflags '-linkmode external -extldflags -static -s -w' -o ovpn-admin && packr2 clean

FROM alpine:3.16
WORKDIR /app
COPY --from=backend-builder /app/ovpn-admin /app
COPY templates/ /app/templates
ARG TARGETARCH
RUN apk add --update bash easy-rsa openssl openvpn coreutils  && \
    ln -s /usr/share/easy-rsa/easyrsa /usr/local/bin && \
    rm -rf /tmp/* /var/tmp/* /var/cache/apk/* /var/cache/distfiles/*