Update scratch design and Add tech ref

Home.md

@@ -1,5 +1,17 @@
 # Welcome to the Generational Heritage wiki!
 
-## Scratch design:
+## Scratch design / Dizájn vázlat:
 
-## Detailed Architectural overview:
+### Tech overview / Technológiai körkép:
+![Scratch overview of the used tech.](assets/scratch_design.drawio.png)
+
+- Platform: *OCI* ([freetier 6ocpu and 26gb ram](https://www.oracle.com/cloud/free/?intcmp=ohp052322ocift#free-cloud-trial))
+- Container orchestration: *[K3S](https://k3s.io/)*
+- Ingress/LoadBalancer: *[Traefik](https://traefik.io/)*
+- Authentication and user management: *[Zitadel](https://zitadel.com/)*
+- Authorization: *A [Go](https://go.dev/) microservice that checks user relationship with other data*
+- Frontend: *[Svelte-kit](https://kit.svelte.dev/)*
+- Backend: *[Go](https://go.dev/) microservice that does the business logic*
+- DNS and proxy provider: *[Cloudflare](https://www.cloudflare.com/)*
+
+## Backend Service Scratch