diff --git a/doc/architecture.md b/doc/architecture.md
new file mode 100644
index 0000000..f36a207
--- /dev/null
+++ b/doc/architecture.md
@@ -0,0 +1,26 @@
+
+```mermaid
+C4Context
+    title c4k-webserver
+    Boundary(website, "website") {
+        System(website_ing1, "ingress f. host meissa-gmbh.de")
+        System(website_ing2, "ingress f. host meissa.de")
+        Boundary(website_pod, "website pod"){
+            Boundary(aaa, "website container") {
+                System(ws, "webserver")
+                SystemDb(file_html, "static html")
+                Rel(ws, file_html, "file ro")
+            }
+            Boundary(aab, "cron build website") {
+                System(git_clone, "git clone/pull & lein ring server & copy to static html")
+                SystemDb(file_git, "git repo")
+                Rel(git_clone, file_git, "file rw")
+                Rel(git_clone, file_html, "file rw")
+            }           
+        }
+        Rel(website_ing1, ws, "http")
+        Rel(website_ing2, ws, "http")        
+    }
+
+```
+[![](https://mermaid.ink/img/pako:eNqNU8tugzAQ_JWVD1UqJaka5cSxSX-guSIhgxewamxkL01RxL_XQFExSdr6gtee2ccMvrDMCGQRO-wPRhN-UqzBL5KkELL9--aMqUP7gXa8eDGNFty2q_5cEq4hZt_bmD3CZUT169Q6wmrCJVIXzz3Yfy06B_kWSuMIKpTO8U1RpeVW9Dl-y7C7n2FJXjaa1EbMmgUfevys34DEOZ-DM68Nl9qLEM647NRNpFGxeT8h9JiucqkwKalSPccRJ5lBH95kvaEasgekPgBrrgjd3aHSnpZZoyFtpBJw27nFVIWkJFNGD177AIbgqW6UggdQKDVY7wmMQ_ujzNQtkIG_hgql8JmnAhZrc1eGWTtz3ijG-d-0UMRrXjfb_9zMpB0sCX7u0f6SqA6yLYC7BTAs4guwNavQVlwK_y4HW2JGJVbepshvBea8URSzWHce2tSCE74KScayKOfK4Zrxhsyp1RmLyDY4gY6SF5ZX42H3BTITMPU)](https://mermaid.live/edit#pako:eNqNU8tugzAQ_JWVD1UqJaka5cSxSX-guSIhgxewamxkL01RxL_XQFExSdr6gtee2ccMvrDMCGQRO-wPRhN-UqzBL5KkELL9--aMqUP7gXa8eDGNFty2q_5cEq4hZt_bmD3CZUT169Q6wmrCJVIXzz3Yfy06B_kWSuMIKpTO8U1RpeVW9Dl-y7C7n2FJXjaa1EbMmgUfevys34DEOZ-DM68Nl9qLEM647NRNpFGxeT8h9JiucqkwKalSPccRJ5lBH95kvaEasgekPgBrrgjd3aHSnpZZoyFtpBJw27nFVIWkJFNGD177AIbgqW6UggdQKDVY7wmMQ_ujzNQtkIG_hgql8JmnAhZrc1eGWTtz3ijG-d-0UMRrXjfb_9zMpB0sCX7u0f6SqA6yLYC7BTAs4guwNavQVlwK_y4HW2JGJVbepshvBea8URSzWHce2tSCE74KScayKOfK4Zrxhsyp1RmLyDY4gY6SF5ZX42H3BTITMPU)
\ No newline at end of file