update krakend

krakend/README.md

@@ -7,4 +7,54 @@ Its core functionality is to create an API that acts as an aggregator of many
 microservices into single endpoints, doing the heavy-lifting automatically for
 you: aggregate, transform, filter, decode, throttle, auth and more.
 
+
+## krakend.json
+
+```json
+{
+  "version": 2,
+  "name": "My httpbin gateway",
+  "port": 8080,
+  "endpoints": [
+    {
+      "endpoint": "/httpbin",
+      "backend": [
+        {
+          "host": [
+            "https://httpbin.org"
+          ],
+          "url_pattern": "/headers"
+        },
+        {
+          "host": [
+            "https://httpbin.org"
+          ],
+          "url_pattern": "/ip"
+        }
+      ]
+    }
+  ]
+}
+```
+
+## up and running
+
+```bash
+$ docker-compose up -d
+$ curl http://localhost:8080/httpbin
+```
+
+## result.json
+
+```
+{
+  "headers": {
+    "Accept-Encoding": "gzip",
+    "Host": "httpbin.org",
+    "User-Agent": "KrakenD Version 1.0.0"
+  },
+  "origin": "172.17.0.1, 1.2.3.4, 172.17.0.1"
+}
+```
+
 [1]: https://www.krakend.io/