fix(devcontainer-base): ARGs must be in the fedora-minimal image section to work

Author: sdwilsh

images/devcontainer-base/Containerfile

@@ -1,12 +1,12 @@
-ARG USERNAME=vscode
-ARG USERID=1000
-ARG GROUPID=1000
-
 FROM scratch AS ctx
 COPY build_files /
 
 FROM quay.io/fedora/fedora-minimal:44
 
+ARG USERNAME=vscode
+ARG USERID=1000
+ARG GROUPID=1000
+
 RUN --mount=type=bind,from=ctx,source=/,target=/ctx \
     --mount=type=cache,dst=/var/cache \
     --mount=type=cache,dst=/var/log \