Add anchors to the EIB Quickstart

Add a couple of anchors to enable references from other files.

Signed-off-by: Marco Chiappero <[email protected]>

asciidoc/quickstart/eib.adoc

@@ -136,6 +136,7 @@ operatingSystem:
 It's also possible to add additional users, create the home directories, set user-id's, add ssh-key authentication, and modify group information. Please refer to the {link-eib-building-images}[upstream building images guide] for further examples.
 ====
 
+[#eib-configuring-rpm-packages]
 === Configuring RPM packages
 
 One of the major features of EIB is to provide a mechanism to add additional software packages to the image, so when the installation completes the system is able to leverage the installed packages right away. EIB permits users to specify the following:
@@ -331,6 +332,7 @@ The network configuration we just created will be parsed and the necessary Netwo
 Please refer to the <<components-nmc, Edge Networking component>> for a more comprehensive explanation of the above configuration and examples of this feature.
 ====
 
+[#eib-how-to-build-image]
 == Building the image
 
 Now that we've got a base image and an image definition for EIB to consume, let's go ahead and build the image. For this, we simply use `podman` to call the EIB container with the "build" command, specifying the definition file: