docs: link container images to our repository

This should fill out the description for the image.

Signed-off-by: Andrey Smirnov <smirnov.andrey@gmail.com>

Dockerfile

@@ -420,6 +420,7 @@ COPY --from=initramfs-archive /initramfs.xz /initramfs-${TARGETARCH}.xz
 
 FROM scratch AS talos
 COPY --from=rootfs / /
+LABEL org.opencontainers.image.source https://github.com/talos-systems/talos
 ENTRYPOINT ["/sbin/init"]
 
 # The installer target generates an image that can be used to install Talos to
@@ -456,6 +457,7 @@ RUN ln -s /bin/installer /bin/talosctl
 ARG TAG
 ENV VERSION ${TAG}
 LABEL "alpha.talos.dev/version"="${VERSION}"
+LABEL org.opencontainers.image.source https://github.com/talos-systems/talos
 ENTRYPOINT ["/bin/installer"]
 ONBUILD RUN apk add --no-cache --update \
     cpio \