Extend database with more tables, rewrite API doc, improve API endpoints

software/backend/models/address.model.ts

@@ -0,0 +1,27 @@
+import { BelongsTo, Column, ForeignKey, Model, Table } from "sequelize-typescript";
+import { Account } from "./account.model";
+
+@Table({ timestamps: false })
+export class Address extends Model {
+  @ForeignKey(() => Account)
+  @Column
+  accountId: number
+
+  @Column
+  street: string
+
+  @Column
+  houseNumber: number
+
+  @Column
+  postalCode: number
+
+  @Column
+  city: string
+
+
+  // Relations
+  
+  @BelongsTo(() => Account)
+  account: Account
+}