Dockerfile: enable initramfs by default

As we progress the composefs work along this is becoming more of a
general requirement.  I think it still makes sense to leave it as
optional for now, but I think for the bulk of the cases we'll want to
go ahead and build the initramfs support in.

Signed-off-by: John Eckersberg <jeckersb@redhat.com>

Author: jeckersb

Dockerfile

@@ -39,8 +39,8 @@ EORUN
 # bootc binaries in /out. The intention is that the target rootfs is extracted from /out
 # back into a final stae (without the build deps etc) below.
 FROM base as build
-# Flip this on to enable initramfs code
-ARG initramfs=0
+# Flip this off to disable initramfs code
+ARG initramfs=1
 # This installs our package dependencies, and we want to cache it independently of the rest.
 # Basically we don't want changing a .rs file to blow out the cache of packages. So we only
 # copy files necessary