docs: update README.md to format code blocks and improve clarity

README.md

@@ -6,7 +6,7 @@ Fastify Server
 
 ### Set your environment variable
 
-```
+```bash
 cd backend
 cp .env.sample .env
 ```
@@ -14,23 +14,26 @@ cp .env.sample .env
 ### Development
 
 Run a mongo container
-```
+
+```bash
 docker run -d -p 27017:27017 mongo
 ```
 
 Install dependencies
-```
+
+```bash
 npm install
 ```
 
 Start development mode
-```
+
+```bash
 npm run dev
 ```
 
 ### Run the test
 
-```
+```bash
 npm run test
 ```
 
@@ -41,21 +44,23 @@ React (by vite)
 ### Development
 
 Install dependencies
-```
+
+```bash
 npm install
 ```
 
 Start development mode
-```
+
+```bash
 cd frontend
 npm run dev
 ```
 
 Visit
-http://localhost:5173
+<http://localhost:5173>
 
 ### Run cypress test
 
-```
+```bash
 npm run cy:test
-```
+```