adding readme file

README.md

@@ -0,0 +1,15 @@
+# CORS-Proxy-NGINX
+
+## Proof of Concept
+Static HTML page that uses ajax to request api respose from express service through nginx proxy. If the ajax requests
+the api directly it should fail with a cors error. The api increments a number everytime the express server responds so
+you should know that the cached version is being hit if the response does not increment
+
+### Steps to run
+1. Build the sample api project ```npm install```
+1. start the sample api ```npm start```
+1. Start the nginx docker container ```docker compose up```
+2. Find local ip address ```ifconfig en0|grep inet|awk '{print $2}'```
+3. Update ajax request in index.html to point to your docker container
+4. Open index.html and refresh to verify value is not incrementing
+5. Wait 15 seconds and value should increment

index.html

@@ -14,7 +14,7 @@ Response: <span id="response"></span>
 <script>
     $(function() {
         $.ajax({
-            url: 'http://localhost:8080/service?url=https://google.com/',
+            url: 'http://localhost:8080/service?url=http://192.168.2.214:3000/',
             success: res => {
                 $('#response').text(res);
             },