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

.gitignore

@@ -0,0 +1,20 @@
+# Runtime data
+data/
+certs/
+
+# Environment files
+.env
+
+# OS files
+.DS_Store
+Thumbs.db
+
+# Editor directories and files
+.idea
+.vscode
+*.swp
+*.swo
+
+# Logs
+*.log
+logs/