fix: rebuild without cache and simplify Dockerfile

- Force no-cache build in docker-compose
- Simplify Dockerfile to use Alpine package manager
- Clean up configuration

Dockerfile

@@ -1,4 +1,4 @@
 FROM registry:2
 
-# The registry:2 image is based on Alpine, so we use apk
-RUN apk add --no-cache apache2-utils
+# Install apache2-utils using Alpine package manager
+RUN apk --no-cache add apache2-utils