component AP gateway: raise exceptions on apGet + fix exceptions catching in apGetLocalObject: new `exceptions.ExternalRequestError` is raised when request done `apGet` has a return code >= 300. Fix wrong exception catched in `apGetLocalObject`.

ARG REVISION
FROM libervia/web:${REVISION:-dev}

LABEL maintainer="Goffi <tmp_dockerfiles@goffi.org>"

ARG DEBIAN_FRONTEND=noninteractive

USER root

COPY --chown=root:root libervia.conf /etc/libervia.conf

WORKDIR /home/libervia
USER libervia