refactor(buildenvs): Align COPY statements in base (#2208)

Reviewed-by: Cezar Craciunoiu <cezar.craciunoiu@unikraft.io>
Approved-by: Cezar Craciunoiu <cezar.craciunoiu@unikraft.io>

Author: craciunoiuc

buildenvs/base.Dockerfile

@@ -13,13 +13,13 @@ FROM ${REGISTRY}/xen:${XEN_VERSION}         AS xen
 FROM ${REGISTRY}/myself:${KRAFTKIT_VERSION} AS myself
 FROM debian:${DEBIAN_VERSION}               AS base
 
-COPY --from=qemu     /bin/        /usr/local/bin
-COPY --from=qemu     /share/qemu/ /share/qemu
-COPY --from=qemu     /lib/x86_64-linux-gnu/ /lib/x86_64-linux-gnu
-COPY --from=myself   /kraft       /usr/local/bin
-COPY --from=xen 	 /usr/lib/x86_64-linux-gnu/*.a /lib/x86_64-linux-gnu
-COPY --from=xen 	 /usr/local/lib/libxen*.a /usr/local/lib/libxen*.so* /usr/local/lib
-COPY --from=xen		 /usr/local/include/* /usr/local/include
+COPY --from=qemu   /bin/                         /usr/local/bin
+COPY --from=qemu   /share/qemu/                  /share/qemu
+COPY --from=qemu   /lib/x86_64-linux-gnu/        /lib/x86_64-linux-gnu
+COPY --from=myself /kraft                        /usr/local/bin
+COPY --from=xen    /usr/lib/x86_64-linux-gnu/*.a /lib/x86_64-linux-gnu
+COPY --from=xen    /usr/local/lib/libxen*.a      /usr/local/lib/libxen*.so* /usr/local/lib/
+COPY --from=xen    /usr/local/include/*          /usr/local/include
 
 # Install unikraft dependencies
 RUN set -xe; \