docs: remove all Coolify references from codebase

Replace Coolify with Docker Compose throughout documentation.
The project never used Coolify - a removal script was created but
never executed, leaving incorrect documentation.

Changes:
- Delete 13 heavily Coolify-focused docs files
- Update ~30 files replacing Coolify → Docker Compose
- Remove obsolete removal script
- Fix deployment references in active and archived projects

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

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

apps-archived/uload/.env.example

@@ -7,7 +7,7 @@ PUBLIC_APP_URL=https://ulo.ad
 # Database (PostgreSQL)
 # Development: Use local Docker container
 DATABASE_URL=postgresql://uload:uload_dev_password_123@localhost:5432/uload_dev
-# Production: Use your Coolify/Hetzner PostgreSQL container
+# Production: Use your Hetzner PostgreSQL container
 # DATABASE_URL=postgresql://uload:your_password@uload-db-prod:5432/uload_prod
 
 # File Storage (Cloudflare R2)
@@ -30,7 +30,7 @@ PUBLIC_UMAMI_WEBSITE_ID=your-website-id
 # AUTH_PROVIDER_CLIENT_ID=
 # AUTH_PROVIDER_CLIENT_SECRET=
 
-# Coolify specific (if needed)
-# These will be set automatically by Coolify
-# COOLIFY_URL=
-# COOLIFY_TOKEN=
+# Docker Compose specific (if needed)
+# These can be set in your .env.production
+# DEPLOY_URL=
+# DEPLOY_TOKEN=