add runtime view

doc/architecture.md

@@ -0,0 +1,51 @@
+# Runtime View
+
+```mermaid
+C4Context
+    title Runtime
+    Enterprise_Boundary(b0, "Infrastructure") {
+        System(dns, "DNS", "Management of DNS-Entries. We use aws/Route53")
+        SystemDb(backup, "Storage for backup", "We use aws/S3") 
+        System(grafana, "Grafana Cloud", "Monitoring your apps")
+        System(devops, "DevOps Workstation")
+        
+
+        Container_Boundary(srv, "Small Server") {
+            Container_Boundary(k3s, "K3S") {
+                Component(lb, "metallb")
+                Component(api, "K8s API")
+                Component(grafana-agent, "Grfana Agent")
+                Container_Boundary(app, "Application") {
+                    Component(app, "App-container")
+                    Component(app-backup, "backup & restore-container using restic")
+                    Container_Boundary(app-storage, "Storage") {
+                        ComponentDb(app-file-storage, "file storage")
+                        ComponentDb(app-db-storage, "postgres")
+                    }                    
+                }
+            }
+            Component(ipv4, "public ipv4")
+            Component(ipv6, "public ipv6")
+            Component(localip, "local-ip")
+            Component(ssh, "ssh tunnel")
+        }
+    }
+
+    Rel(devops, ssh, "ssh")
+    Rel(ssh, localip, "tcp")
+    Rel(localip, api, "tcp")
+
+    Rel(ipv4, lb, "tcp")
+    Rel(ipv6, lb, "tcp")
+    Rel(lb, app, "tcp")
+    Rel(app, app-file-storage, "file")
+    Rel(app, app-db-storage, "*dbc")
+
+    Rel(grafana-agent, api, "http")
+    Rel(grafana-agent, grafana, "http")
+
+    Rel(app-backup, backup, "s3")
+    Rel(app-backup, app-file-storage, "file")
+    Rel(app-backup, app-db-storage, "*dbc")
+
+```