Remove CONFIGURATION.md and DEPLOYMENT.md files

Removed documentation files and updated references:
- Deleted CONFIGURATION.md and DEPLOYMENT.md
- Updated Dockerfile to remove CONFIGURATION.md copy
- Updated start.sh to remove CONFIGURATION.md copy
- Fixed license reference back to AGPL-3.0 (Docmost's actual license)

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

start.sh

@@ -11,12 +11,11 @@ if [ ! -d "/app/data/client-dist" ]; then
     chown -R cloudron:cloudron /app/data/client-dist
 fi
 
-# Copy sample .env file and documentation for user reference
+# Copy sample .env file for user reference
 if [ ! -f "/app/data/env.sample" ]; then
     echo "=> Copying configuration files to /app/data/"
     cp /app/code/env.sample /app/data/env.sample
-    cp /app/code/CONFIGURATION.md /app/data/CONFIGURATION.md
-    chown cloudron:cloudron /app/data/env.sample /app/data/CONFIGURATION.md
+    chown cloudron:cloudron /app/data/env.sample
 fi
 
 # Initialize /app/data if it's empty (first run)