refactor: simplify registry to basic setup

- Reduce to only registry:2 image
- Remove unnecessary configuration files
- Add basic .gitignore and env.example
- Keep only essential docker-compose configuration

env.example

@@ -0,0 +1,9 @@
+# Registry Configuration
+REGISTRY_STORAGE_PATH=/var/lib/registry
+
+# Expose settings
+REGISTRY_PORT=5000
+
+# Optional SSL Configuration
+# SSL_CERT_PATH=./certs/domain.crt
+# SSL_KEY_PATH=./certs/domain.key