docs: Add Getting Started (#6)

Co-authored-by: Sakamoto, Kazunori <[email protected]>

README.md

@@ -3,3 +3,43 @@
 [![Test](https://github.com/exKAZUu-Research/trace-dojo/actions/workflows/test.yml/badge.svg)](https://github.com/exKAZUu-Research/trace-dojo/actions/workflows/test.yml)
 
 An educational web app for training program tracing skills.
+
+## Getting Started
+
+### Installation
+
+1. Clone the repo
+
+   ```
+   git clone [email protected]:exKAZUu-Research/trace-dojo.git
+   ```
+
+1. Install dependencies
+
+   ```
+   yarn install
+   ```
+
+1. Reset local database by applying migration files and adding initial records
+
+   ```
+   yarn db-reset
+   ```
+
+### Start Development
+
+1. Start Next server
+
+   ```
+   yarn start
+   ```
+
+### Change Database Schema
+
+1. Change `prisma/schema.prisma`
+
+1. Create migration files on the basis of `prisma/schema.prisma`
+
+   ```
+   yarn db-migrate-create
+   ```