data injection docs

examples/kiwix/manifests/deployment.yaml

@@ -15,6 +15,7 @@ spec:
         app: kiwix-serve
     spec:
       # Kiwix can hot-load files from the filesystem, but if your application cannot, this example shows how you can use an initContainer to bootstrap the injected files.
+      # It's necessary to include the ###ZARF_DATA_INJECTION_MARKER### somewhere in the podspec, otherwise data injections will not occur.
       initContainers:
         - name: data-loader
           image: alpine:3.18

site/src/content/docs/ref/components.mdx

@@ -14,7 +14,7 @@ These components define what dependencies they have along with a declarative def
 
 Each package can have as many components as the package creator wants but a package isn't anything without at least one component.
 
-{/* 
+{/*
 ## What can be Packaged?
 
 The following types of software can be rolled into a Zarf Package:
@@ -141,10 +141,10 @@ Images can either be discovered manually, or automatically by using [`zarf dev f
 
 ### Git Repositories
 
-The [`podinfo-flux`](/ref/examples/podinfo-flux/) example showcases a simple GitOps workflow using Flux and Zarf.
-
 <Properties item="ZarfComponent" include={["repos"]} />
 
+The [`podinfo-flux`](/ref/examples/podinfo-flux/) example showcases a simple GitOps workflow using Flux and Zarf.
+
 <Tabs>
   <TabItem label="Full Mirror">
     <ExampleYAML src={import("../../../../../examples/git-data/zarf.yaml?raw")} component="full-repo" />
@@ -208,6 +208,10 @@ Git repositories included in a package can be deployed with `zarf package deploy
 
 <Properties item="ZarfComponent" include={["dataInjections"]} />
 
+During `zarf package create`, data injections pull files from the host at the path specified by the `source` key. During `zarf package deploy`, these files are injected into the container specified by the `target` key. The pod holding the targeted container must have the variable `###ZARF_DATA_INJECTION_MARKER###` within the pod spec otherwise the data injection will not occur. This variable gets templated at deploy time to become the name of the extra file Zarf injects into the pod to signify that the data injection is complete.
+
+The [`kiwix`](/ref/examples/kiwix/) example showcases a simple data injection use case.
+
 <ExampleYAML src={import("../../../../../examples/kiwix/zarf.yaml?raw")} component="kiwix-serve" />
 
 ### Component Imports