docs: add rest api examples

Author: subbuv26

README.md

@@ -2,3 +2,81 @@
 
 A Reverse Proxy that serves HTTP endpoints for gRPC Server https://github.com/subbuv26/image-array-grpc
 
+# REST API
+
+## Get List of Images
+
+### Request
+    GET localhost:8080/images
+
+### Repsonse
+    < HTTP/2 200
+    < content-type: application/json
+    < content-length: 116
+    < apigw-requestid: BjYDVgoOBcwEMTg=
+    < grpc-metadata-content-type: application/grpc
+
+    {
+        "Images": [
+            {
+                "url": "image.png",
+                "name": "profile",
+                "size": 1000
+            },
+            {
+                "url": "image2.png",
+                "name": "profile",
+                "size": 2000
+            }
+        ]
+    }
+
+## Get an Image
+### Request
+    GET localhost:8080/images/f2a5e510-ef20-4d60-a68f-b50baffdfae6
+### Repsonse
+    < HTTP/2 200
+    < content-type: application/json
+    < content-length: 116
+    < apigw-requestid: BjYDVgoOBcwEMTg=
+    < grpc-metadata-content-type: application/grpc
+
+    {
+        "url": "image2.png",
+        "name": "profile",
+        "size": 2000
+    }
+
+## Create an Image
+### Request
+    POST localhost:8080/images/
+### Body
+    {
+        "url": "image2.png",
+        "name": "profile",
+        "size": 2000
+    }
+### Response
+    < HTTP/2 200
+    < content-type: application/json
+    < content-length: 116
+    < apigw-requestid: BjYDVgoOBcwEMTg=
+    < grpc-metadata-content-type: application/grpc
+
+    {
+        "id": "f2a5e510-ef20-4d60-a68f-b50baffdfae6"
+    }
+
+## Delete an Image
+### Request
+    DELETE localhost:8080/images/f2a5e510-ef20-4d60-a68f-b50baffdfae6
+### Repsonse
+    < HTTP/2 200
+    < content-type: application/json
+    < content-length: 116
+    < apigw-requestid: BjYDVgoOBcwEMTg=
+    < grpc-metadata-content-type: application/grpc
+
+    {
+        "success": true
+    }