gentoo: install bubblewrap

gentoo

@@ -3,7 +3,8 @@ FROM gentoo/stage3-amd64:latest
 
 COPY --from=portage /usr/portage /usr/portage
 
-ENV EMERGE_DEFAULT_OPTS="--jobs=9 --load-average=8 --with-bdeps=y" \
+ENV ACCEPT_KEYWORDS="~amd64" \
+    EMERGE_DEFAULT_OPTS="--jobs=9 --load-average=8 --with-bdeps=y" \
     FEATURES="-sandbox -usersandbox" \
     MAKEOPTS="-j9 -l8" \
     USE="cairo introspection jpeg tiff"
@@ -15,5 +16,6 @@ RUN eselect locale set en_US.utf8 \
     dev-python/pygobject \
     media-libs/exiftool \
     media-libs/mutagen \
+    sys-apps/bubblewrap \
     virtual/ffmpeg \
     x11-libs/gdk-pixbuf