Add lecture notes on virtualization, basic network services, backup systems, and monitoring

- Introduced comprehensive notes on virtualization, covering architecture, hypervisors, and containerization.
- Added detailed lecture on basic network services including DNS, DHCP, and NTP, emphasizing their importance in IT infrastructure.
- Included notes on backup systems (СРК), discussing RTO, RPO, and backup strategies.
- Documented the significance of monitoring systems, differentiating between monitoring and observability, and outlining key metrics to track.
- Created new markdown files for personal projects on home server setup and containerization, linking them to the main notes.

_config.yml

@@ -61,6 +61,15 @@ defaults:
       toc: false
       author_profile: true
 
+obsidian:
+  vault: "_notes"          # где лежат md-файлы Obsidian
+  wikilinks: true          # включить [[wiki-ссылки]]
+  # ниже — удобные опции
+  downcase: true           # приводить ссылки к нижнему регистру
+  slugify: true            # заменять пробелы/кириллицу на слаг
+  ext: ".md"
+  attachments_dir: "assets/cache/"
+
 # --- Навигация (подключим _data/navigation.yml) ---
 navigation:
   main: true