Update mermaid ERD

README.md

@@ -18,3 +18,90 @@ npm run dev
 ## API Document
 
 [API document](https://dev-bai.gdsckaist.com/api-docs)
+
+## Documentation
+
+### ERD
+
+```mermaid
+%%{init: {'theme': 'forest' } }%%
+erDiagram
+    organizations {
+        int id PK
+        string name UK
+    }
+    users ||--o| organizations : belongs
+    users {
+        int id PK
+        string email UK
+        string password
+        string initialPassword
+        enum role
+        boolean isDisabled
+    }
+    organizations ||--o{ budgets: has
+    budgets {
+        int id PK
+        string manager
+        int year
+        string half
+        boolean isReadOnly
+    }
+    budgets ||--o{ incomes: has
+    incomes {
+        int id PK
+        string code
+        enum source
+        string category
+        string content
+        int amount
+        string note
+    }
+    budgets ||--o{ expenses: has
+    expenses {
+        int id PK
+        string code
+        enum source
+        string category
+        string project
+        string content
+        int amount
+        string note
+    }
+    incomes ||--o{ transactions: has
+    expenses ||--o{ transactions: has
+    transactions {
+        int id PK
+        date projectAt
+        string manager
+        string content
+        enum type
+        int amount
+        date transactionAt
+        int balance
+        string accountNumber
+        string accountBank
+        string accountOwner
+        string receivingAccountNumber
+        string receivingAccountBank
+        string receivingAccountOwner
+        boolean hasBill
+    }
+    audit_periods {
+        int year PK
+        string half PK
+        date start
+        date end
+    }
+    organizations ||--o{ accounts : has
+    accounts {
+        int id PK
+        int year
+        string half
+        string name
+        string accountNumber
+        string accountBank
+        string accountOwner
+        string cardNumber
+    }
+```