Add Kubernetes-based sandbox provider for multi-instance support (#19)

* feat: adds docker-based dev environment

* docs: updates Docker command help

* fix local dev

* feat(sandbox): add Kubernetes-based sandbox provider for multi-instance support

* fix: skills path in k8s

* feat: add example config for k8s sandbox

* fix: docker config

* fix: load skills on docker dev

* feat: support sandbox execution to Kubernetes Deployment model

* chore: rename web service name

.dockerignore

@@ -51,3 +51,20 @@ examples/
 assets/
 tests/
 *.log
+
+# Exclude directories not needed in Docker context
+# Frontend build only needs frontend/
+# Backend build only needs backend/
+scripts/
+logs/
+docker/
+skills/
+frontend/.next
+frontend/node_modules
+backend/.venv
+backend/htmlcov
+backend/.coverage
+*.md
+!README.md
+!frontend/README.md
+!backend/README.md