Revert "compact flow diagram to 4 nodes"

This reverts commit 5ed237f.

Author: AlexF4Dev

README.md

@@ -51,9 +51,17 @@ CI runs automatically on push to main and PRs with 5 parallel validation jobs.
 
 ```mermaid
 flowchart TD
-    A["Cron polls GHCR for latest semver tags"] --> B["Compare with .env — create PR if changed"]
-    B --> C["PR merges → deploy to server"]
-    C --> D["Slack notification with versions"]
+    A["Cron schedule"] --> B["Query GHCR API + semver filter"]
+    B --> C{"New tags?"}
+    C -- Yes --> D["Read current tags from .env"]
+    D --> E{"Changed?"}
+    E -- Yes --> F["Update .env via sed"]
+    F --> G["Create PR + auto-merge"]
+    G --> H["PR merges to deploy branch"]
+    H --> I{"paths filter"}
+    I -- Match --> J["Copy files to server"]
+    J --> K["docker compose up"]
+    K --> L["Slack notify"]
 ```
 
 Three deployment strategies: EC2/AWS, SSH, or self-hosted runner.