feat: Update applyTo in containerization-docker-best-practices.instructions.md (#186)

Allow to use this instruction only when you are working in docker files

Author: MovingLive

instructions/containerization-docker-best-practices.instructions.md

@@ -1,5 +1,5 @@
 ---
-applyTo: '*'
+applyTo: '**/Dockerfile,**/Dockerfile.*,**/*.dockerfile,**/docker-compose*.yml,**/docker-compose*.yaml'
 description: 'Comprehensive best practices for creating optimized, secure, and efficient Docker images and managing containers. Covers multi-stage builds, image layer optimization, security scanning, and runtime best practices.'
 ---