removed apt simulation doing now real apt updates/install

post_installation_script_test/README.md

@@ -13,7 +13,7 @@ This directory contains everything needed to test the post-installation script i
 Provides a reproducible testing environment that allows:
 
 - Running the post-installation script without affecting the host system
-- Simulating `apt` installations (safe, no real package changes)
+- Real `apt` installations (isolated in container)
 - Testing script logic, prompts, and error handling
 - Validating syntax and tracing execution
 
@@ -22,8 +22,8 @@ Provides a reproducible testing environment that allows:
 The Dockerfile includes:
 
 - Ubuntu 22.04 base image
-- Simulated `sudo` wrapper that runs `apt-get -s install` (simulates installs without making changes)
-- Useful utilities: `bash`, `wget`, `tar`, `curl`, `gnupg`, `ca-certificates`, `file`, `procps`
+- Passwordless sudo for real apt installations
+- Useful utilities: `bash`, `wget`, `tar`, `curl`, `gnupg`, `ca-certificates`, `file`, `procps`, `sudo`
 
 ## Usage
 
@@ -49,12 +49,13 @@ sh 02_start_container_with_image.sh
 After container is started an interactive session was started in the container and the script can be started for testing
 
 ```bash
-sh script.sh
+ls -al
+sh <scriptName>.sh
 ```
 
 ## Security Notes
 
 - The script is mounted read-only (`:ro` flag) to prevent container from modifying host files
-- Container runs with reduced privileges (`--cap-drop ALL --security-opt no-new-privileges`)
-- The `sudo` wrapper simulates apt operations, so no packages are actually installed
+- All apt installations are real but isolated in the container
 - Use `--tmpfs /tmp:rw` for any temporary writes inside the container
+- Container is automatically removed after exit (`--rm` flag)