Create architecture.md

Author: TobiasNx

architecture.md

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+
+
+```mermaid
+flowchart BT
+    n1["Allegro"] --> n4
+    n2["Lobid<br>Resources"] <-- Index Query --> n4
+    n3["Hebis"] <-- SRU Query --> n4
+
+    subgraph s1["Strapi"]
+        n4["RPB"]
+        n5["RPPD"]
+    end
+    subgraph s2["ElasticSearch"]
+        n6["RPB"]
+        n7["RPPD"]
+    end
+      subgraph s3["Play"]
+        n8["RPB"]
+        n9["RPPD"]
+        n10["BiblioVino"]
+    end
+
+    n4 --> n6["ElasticSearch<br>(lobid resources Basis)"]
+    n5 --> n7["ElasticSearch<br>(lobid GND Basis)"]
+    n6 --> n8["RPB"]
+    n5 <--> n4
+    n7 --->n9
+    n6 --->n10
+
+    n1@{ shape: db}
+    n2@{ shape: db}
+    n3@{ shape: db}
+    n6@{ shape: db}
+    n8@{ shape: display}
+    n7@{ shape: db}
+    n9@{ shape: display}
+    n10@{ shape: display}
+```