Feat: remade project launching to be possible via helm chart

The magic is done. To launch it:

• Install helm
• Enter the helm script: cd helm-chart/todo-app
• Package it: helm package .
• Run it: helm install my-todo-app todo-app-0.1.0.tgz
• View kubectl status: kubectl get po -A
• Stop it: helm uninstall my-todo-app && rm todo-app-0.1.0.tgz

Let me know if something doesn't work!

Closes #20 (closed)