docs: add role description

docs/docs/architecture/_category_.json

@@ -1,4 +1,4 @@
 {
   "label": "Architecuture",
-  "position": 3
+  "position": 4
 }

docs/docs/architecture/er.md

@@ -2,6 +2,6 @@
 sidebar_position: 3
 ---
 
-# DataBase
+# ER diagram
 
-![ER](./img/er.svg)
+![ER](./img/er.svg)

docs/docs/getstarted/docker.md

@@ -1,7 +1,7 @@
 ---
-sidebar_position: 2
+sidebar_position: 3
 ---
 
 # Running TestPlat as a Docker container
 
-## 
+Under development

docs/docs/getstarted/manual.md

@@ -1,5 +1,5 @@
 ---
-sidebar_position: 3
+sidebar_position: 2
 ---
 
 # Running TestPlat manually
@@ -24,7 +24,7 @@ Moves to backend directory, then install dependencies.
 
 ```bash
 cd backend
-npm ci
+npm install
 ```
 
 Initialize the database with the following command.
@@ -45,7 +45,7 @@ Moves to frontend directory, then install dependencies.
 
 ```bash
 cd frontend
-npm ci
+npm install
 ```
 
 Start frontend server

docs/docs/getstarted/selfhost.md

@@ -6,5 +6,5 @@ sidebar_position: 1
 
 TestPlat is designed for self-hosted use. There are two ways to self-host the application: “Manual” and “Docker”.
 
-- Docker (Recommended)
 - Manual
+- Docker

docs/docs/usage/_category_.json

@@ -0,0 +1,4 @@
+{
+  "label": "Usage",
+  "position": 3
+}

docs/docs/usage/roles.md

@@ -0,0 +1,67 @@
+---
+sidebar_position: 1
+---
+
+# Roles
+
+There are two types of roles in LandTCMS: "Global roles" and "Project roles".
+
+## Global roles
+
+This role is tied to each user's information and affects the entire site, regardless of the project.
+There are two types of roles:
+
+- Administrator
+- User
+
+Administrators can manage site-wide settings and users from the “Administration” menu.
+
+## Project roles
+
+This role can be set for members participating in each project.
+There are three types of roles:
+
+- Manager
+- Developer
+- Reporter
+
+### Permissions for each role
+
+#### Project
+
+| Action | Manager/Owner | Developer | Reporter | Not member |
+| ------ | ------------- | --------- | -------- | ---------- |
+| Delete | ✅            | ❌        | ❌       | ❌         |
+| Update | ✅            | ❌        | ❌       | ❌         |
+| Read   | ✅            | ✅        | ✅       | 🌓         |
+
+#### Project Members
+
+| Action      | Manager/Owner | Developer | Reporter | Not member |
+| ----------- | ------------- | --------- | -------- | ---------- |
+| Add         | ✅            | ❌        | ❌       | ❌         |
+| Delete      | ✅            | ❌        | ❌       | ❌         |
+| Change role | ✅            | ❌        | ❌       | ❌         |
+| Read        | ✅            | ✅        | ✅       | 🌓         |
+
+#### Folders and Test cases
+
+| Action | Manager/Owner | Developer | Reporter | Not member |
+| ------ | ------------- | --------- | -------- | ---------- |
+| Create | ✅            | ✅        | ❌       | ❌         |
+| Delete | ✅            | ✅        | ❌       | ❌         |
+| Update | ✅            | ✅        | ❌       | ❌         |
+| Read   | ✅            | ✅        | ✅       | 🌓         |
+
+#### Test runs
+
+| Action | Manager/Owner | Developer | Reporter | Not member |
+| ------ | ------------- | --------- | -------- | ---------- |
+| Create | ✅            | ✅        | ✅       | ❌         |
+| Delete | ✅            | ✅        | ✅       | ❌         |
+| Update | ✅            | ✅        | ✅       | ❌         |
+| Read   | ✅            | ✅        | ✅       | 🌓         |
+
+1. "Owner" and "Not member" are not role. "Owner" is the user who created project.
+   "Not member" means a user who is not a project member
+1. 🌓 means that read permission is only allowed if the project is set to public.