restructure site nav

mkdocs.yml

@@ -9,7 +9,8 @@ extra_css:
     - stylesheets/custom.css
 nav:
 - Home: index.md
-- Fundamentals Series:
+- Level 101:
+    - Fundamentals Series:
         - Linux Basics:
             - Introduction: linux_basics/intro.md
             - Command Line Basics: linux_basics/command_line_basics.md
@@ -28,13 +29,13 @@ nav:
             - TCP: linux_networking/tcp.md
             - Routing: linux_networking/ipr.md
             - Conclusion: linux_networking/conclusion.md
-- Python and Web:
+    - Python and Web:
         - Introduction: python_web/intro.md
         - Some Python Concepts: python_web/python-concepts.md
         - Python, Web and Flask: python_web/python-web-flask.md
         - The URL Shortening App: python_web/url-shorten-app.md
         - Conclusion: python_web/sre-conclusion.md
-- Data:
+    - Data:
         - Relational Databases:
             - Introduction: databases_sql/intro.md
             - Key Concepts: databases_sql/concepts.md
@@ -55,13 +56,13 @@ nav:
             - Introduction: big_data/intro.md
             - Evolution and Architecture of Hadoop: big_data/evolution.md
             - Conclusion: big_data/tasks.md
-- Systems Design:
+    - Systems Design:
         - Introduction: systems_design/intro.md
         - Scalability: systems_design/scalability.md
         - Availability: systems_design/availability.md
         - Fault Tolerance: systems_design/fault-tolerance.md
         - Conclusion: systems_design/conclusion.md
-- Metrics and Monitoring:
+    - Metrics and Monitoring:
         - Introduction: metrics_and_monitoring/introduction.md
         - Command-line Tools: metrics_and_monitoring/command-line_tools.md
         - Third-party Monitoring: metrics_and_monitoring/third-party_monitoring.md
@@ -69,13 +70,15 @@ nav:
         - Best Practices for Monitoring: metrics_and_monitoring/best_practices.md
         - Observability: metrics_and_monitoring/observability.md
         - Conclusion: metrics_and_monitoring/conclusion.md
-- Security:
+    - Security:
         - Introduction: security/intro.md
         - Fundamentals of Security: security/fundamentals.md
         - Network Security: security/network_security.md
         - Threat, Attacks & Defences: security/threats_attacks_defences.md
         - Writing Secure code: security/writing_secure_code.md
         - Conclusion: security/conclusion.md
+#- Level 102:
+ 
 - Contribute: CONTRIBUTING.md
 - Code of Conduct: CODE_OF_CONDUCT.md
 - SRE Community: sre_community.md