Fix 404 errors by using .md extension in links

Author: Idate96

docs/index.md

@@ -1,28 +1,26 @@
 # RSL Euler Cluster Guide
 
-## 📚 Complete Guide - All Sections
-
-### [→ View Full Complete Guide](complete-guide/)
-
-1. [Access Requirements](complete-guide/#1-access-requirements)
-2. [Connecting to Euler via SSH](complete-guide/#2-connecting-to-euler-via-ssh)
-   - [Basic Login](complete-guide/#21-basic-login)
-   - [Setting Up SSH Keys](complete-guide/#22-setting-up-ssh-keys-recommended)
-   - [Using an SSH Config File](complete-guide/#23-using-an-ssh-config-file)
-3. [Verifying Access to RSL Shareholder Group](complete-guide/#3-verifying-access-to-the-rsl-shareholder-group)
-4. [Data Management on Euler](complete-guide/#4-data-management-on-euler)
-5. [Setting Up Miniconda Environments](complete-guide/#5-setting-up-miniconda-environments)
-6. [Interactive Sessions](complete-guide/#6-interactive-sessions)
-7. [Sample Sbatch Scripts](complete-guide/#7-sample-sbatch-scripts)
-8. [Sample Training Workflow (Conda)](complete-guide/#8-sample-training-workflow-conda)
-9. [Sample Container Workflow](complete-guide/#9-sample-container-workflow)
-10. [Useful Links](complete-guide/#10-useful-links)
-
-## 🚀 Other Guides
-
-- [Container Workflow](container-workflow/) - Docker/Singularity detailed guide
-- [Scripts Library](scripts/) - Ready-to-use job scripts
-- [Troubleshooting](troubleshooting/) - Common issues and solutions
+## 📚 Documentation
+
+### Complete Guide
+**[Open Complete Guide →](complete-guide.md)**
+
+The complete guide contains:
+- Access Requirements
+- Connecting to Euler via SSH
+- Verifying RSL Group Membership  
+- Data Management on Euler
+- Setting Up Miniconda Environments
+- Interactive Sessions
+- Sample Sbatch Scripts
+- Sample Training Workflow
+- Container Workflow
+- Useful Links
+
+### Other Resources
+- **[Container Workflow](container-workflow.md)** - Docker/Singularity detailed guide
+- **[Scripts Library](scripts.md)** - Ready-to-use job scripts
+- **[Troubleshooting](troubleshooting.md)** - Common issues and solutions
 
 ## 🎯 Quick Start