Divide container doc

Author: gwangmu

docs/software/container-engine/index.md

@@ -26,7 +26,7 @@ Through the EDF, container use cases can be abstracted to the point where end us
 
 Let's set up a containerized Ubuntu 24.04 environment on the scratch folder (`${SCRATCH}`).
 Save this file below as `ubuntu.toml` in `${HOME}/.edf` directory (the default location of EDF files).
-A more detailed explanation of each entry for the EDF can be seen in the [EDF reference][ref-ce-edf-reference].
+A more detailed explanation of each entry for the EDF can be seen in the [EDF reference][./edf.md].
 
 ```bash
 image = "library/ubuntu:24.04"
@@ -269,4 +269,3 @@ Using the `enroot import` documentation page as a reference:
     machine registry.ethz.ch login <username> password <GITLAB_TOKEN>
     machine gitlab.ethz.ch login <username> password <GITLAB_TOKEN>  
     ```
-

mkdocs.yml

@@ -90,7 +90,7 @@ nav:
       - software/container-engine/index.md
       - 'Resource and hooks': software/container-engine/resource-hook.md
       - 'EDF reference': software/container-engine/edf.md
-      - 'Known issues': software/container-engine/known-issues.md
+      - 'Known issues': software/container-engine/known-issue.md
     - 'Unsupported Software': software/unsupported.md
   - 'Services':
     - services/index.md