Enhance Docs for Custom Apps: Base64 Decoding for Testing and Fix 'nginx-entrypoint.sh: No Such File' Issue on Windows only" (#1479)

* Decode the Base64-encoded Environment Variable

* add docs to fix nginx-entrypoint.sh: no such file on windows

* Revert "add docs to fix nginx-entrypoint.sh: no such file on windows"

This reverts commit 395d7cfa3f.

* add docs to fix nginx-entrypoint.sh: no such file on windows

* Fix files according to pre-commit hooks

docs/custom-apps.md

@@ -34,6 +34,18 @@ You can also generate base64 string from json file:
 export APPS_JSON_BASE64=$(base64 -w 0 /path/to/apps.json)
 ```
 
+Test the Previous Step: Decode the Base64-encoded Environment Variable
+
+To verify the previous step, decode the APPS_JSON_BASE64 environment variable (which is Base64-encoded) into a JSON file. Follow the steps below:
+
+1. Use the following command to decode and save the output into a JSON file named apps-test-output.json:
+
+```shell
+echo -n ${APPS_JSON_BASE64} | base64 -d > apps-test-output.json
+```
+
+2. Open the apps-test-output.json file to review the JSON output and ensure that the content is correct.
+
 Note:
 
 - `url` needs to be http(s) git url with personal access tokens without username eg:- http://{{PAT}}@github.com/project/repository.git in case of private repo.

docs/error-nginx-entrypoint-windows.md

@@ -0,0 +1,12 @@
+# Resolving Docker `nginx-entrypoint.sh` Script Not Found Error on Windows
+
+If you're encountering the error `exec /usr/local/bin/nginx-entrypoint.sh: no such file or directory` in a Docker container on Windows, follow these steps to resolve the issue.
+
+## 1. Check Line Endings
+
+On Windows, files often have `CRLF` line endings, while Linux systems expect `LF`. This can cause issues when executing shell scripts in Linux containers.
+
+- **Convert Line Endings using `dos2unix`:**
+  ```bash
+  dos2unix resources/nginx-entrypoint.sh
+  ```