Add requirement on access to Gitlab Container Registry

.gitignore

@@ -7,3 +7,6 @@ files-from-repos/nginx-README.md
 
 # python
 .python-version
+
+# MacOS
+.DS_Store

docs/tech/installation.md

@@ -26,12 +26,12 @@ These requirements ensure that the backend server can handle data processing eff
 * [Docker Engine](https://docs.docker.com/engine/install/).
 * [Docker Compose](https://docs.docker.com/compose/install/linux/) with recomended version v2.27.0
 
-Make sure to install Docker and Docker Compose before proceeding with the installation.
+Make sure to install Docker and Docker Compose before proceeding with the installation. 
 
-The installation files for deployment are zipped and available on GitLab.
-You can download them from [here](https://gitlab.fi.muni.cz/inject/inject-docs/-/raw/main/files-from-repos/deployment-files.zip?ref_type=heads&inline=false)  
+Download zipped installation files from [Gitlab](https://gitlab.fi.muni.cz/inject/inject-docs/-/raw/main/files-from-repos/deployment-files.zip?ref_type=heads&inline=false).
 
 These files include all necessary configuration files, scripts, and the `.env` file needed for deployment.
+Be sure that your server can access `https://gitlab.fi.muni.cz:5050` to pull Docker images.
 
 {%
    include-markdown "../../files-from-repos/nginx-README.md"