docs: update README

Author: takealook97

README.md

@@ -1,25 +1,55 @@
 # Random Sentence API
 
-## based on
+## 🗂️ Data Source
 
 - traditional korean proverbs, more than 4,000
+    - from https://www.krpia.co.kr/product/main?plctId=PLCT00004626#none
 - famous saying (soon)
 - maxim (soon)
 
 ---
 
-## direction
+## 📚 Specification
 
-### api url
+(No author information is provided for traditional Korean proverbs.)
 
-💡`https://sentence.udtk.site/random/{count}`
+### 1. `https://sentence.udtk.site/{id}`
 
-- count : number of sentences to get
-- count range : 1 ~ 20
+- **description** : return a sentence by id
+
+### 2. `https://sentence.udtk.site/random?count=`
+
+- **description** : return several random sentences
+- request parameter : `count`
+    - count : number of sentences to get
+        - range : 1 ~ 20
+        - default : 1
+
+### 3. `https://sentence.udtk.site/language?language=&count=`
+
+- **description** : return random sentences in chosen language
+- request parameter : language, count
+    - language : `kor`, `eng`
+        - default : `kor`
+    - count : number of sentences to get
+        - range : 1 ~ 20
+        - default : 1
+
+### 4. `https://sentence.udtk.site/sort?sort=&count=`
+
+- **description** : return random sentences in chosen sort
+- request parameter : `sort`, `count`
+    - sort : `가1`, `가2`, `나`, `다`, `마`, `바`, `사1`, `사2`, `아1`, `아2`, `자1`, `자2`, `차`, `카`, `타`, `파`, `하`, `quote`
+        - default : `가1`
+    - count : number of sentences to get
+        - range : 1 ~ 20
+        - default : 1
+
+---
 
 ### response example
 
-`https://sentence.udtk.site/random/2`
+ex) https://sentence.udtk.site/random?count=2
 
 ```json
 [
@@ -34,15 +64,15 @@
 ]
 ```
 
-### request limit
+### ❗️request limit
 
-- 20 requests per 5 minutes
-- when the limit is exceeded, the response will be `429 Too Many Requests`
-    - time left to reset the limit will be included in the response header `X-Rate-Limit-Retry-After-Seconds`
+- **<U>20 requests per 5 minutes</U>**
+- when the limit is exceeded, the response will be 429 Too Many Requests
+- time left to reset the limit will be included in the response header X-Rate-Limit-Retry-After-Seconds
 
 ---
 
-## stack
+## 🛠️ Stack
 
 - Java 17
 - Spring Boot 3.3.3
@@ -57,6 +87,6 @@
 
 ---
 
-## architecture
+## 🏗️ Architecture
 
-<img src="./assets/sentence-architecture.jpg" alt="architecture">
+<img src="./assets/sentence-architecture.jpg" alt="architecture" width=600>