Investigating VM crash

docs/IMMEDIATE_FIX.md

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+# IMMEDIATE FIX - VM Crash Prevention
+
+## TL;DR
+
+**Root Cause:** Serial console service (`serial-getty@ttyS0`) crashed 421,491 times over 50 days, exhausting memory.
+
+**NOT caused by:** Your posterg website/application (it's innocent!)
+
+## The Fix (5 minutes, zero downtime)
+
+SSH into the server and run:
+
+```bash
+ssh theophile@posterg.erg.be -p 3274
+
+# Disable the broken serial console service
+sudo systemctl stop serial-getty@ttyS0.service
+sudo systemctl disable serial-getty@ttyS0.service
+sudo systemctl mask serial-getty@ttyS0.service
+
+# Verify it's masked
+sudo systemctl status serial-getty@ttyS0.service
+# Should show: "Loaded: masked"
+
+# Check system health
+free -h
+systemctl --failed
+```
+
+## Done!
+
+The VM will no longer crash from this issue. See `VM_Crash_Analysis_FINAL.md` for complete details.
+
+## Bonus: Clean Up the Database Schema Errors
+
+While you're there, fix the post-reboot database issues:
+
+```bash
+cd /var/www/posterg
+
+# Check which migrations need to run
+ls -la storage/migrations/
+
+# If migrations exist, apply them manually or:
+# Review and fix the missing 'tags' table and 'ts.role' column
+sqlite3 storage/posterg.db "SELECT name FROM sqlite_master WHERE type='table';"
+```
+
+---
+
+**Summary Stats:**
+- Serial getty crashes: **1,264,488**
+- Restart counter at OOM: **421,491**
+- Days until OOM: **~50 days**
+- Your application's fault: **0%** ✅