add an example

README.md

@@ -41,6 +41,7 @@ The API recognizes the following properties under the top-level `api` key in you
 |---|---|---|---|
 |`host`|*yes*||specifies the url under which the http service is to run|
 |`textAnalyzer`|*yes*|*addressit*|can be either `libpostal` or `addressit` however will soon be deprecated and only `libpostal` will be supported going forward|
+|`indexName`|*no*|*pelias*|name of the Elasticsearch index to be used when building queries|
 |`legacyUrl`|*no*||the url to redirect to in case the user does not specify a version such as `v1`
 |`relativeScores`|*no*|true|if set to true, confidence scores will be normalized, realistically at this point setting this to false is not tested or desirable
 |`accessLog`|*no*||name of the format to use for access logs; may be any one of the
@@ -48,6 +49,41 @@ The API recognizes the following properties under the top-level `api` key in you
   `"common"`; if set to `false`, or an otherwise falsy value, disables access-logging entirely.|
 |`pipService`|*yes*||full url to the pip service to be used for coarse reverse queries. if missing, which is not recommended, the service will default to using nearby lookups instead of point-in-polygon.|
 
+Example configuration file would look something like this:
+
+```
+{
+  "esclient": {
+    "keepAlive": true,
+    "requestTimeout": "1200000",
+    "hosts": [
+      {
+        "protocol": "http",
+        "host": "somesemachine.elb.amazonaws.com",
+        "port": 9200
+      }
+    ]
+  },
+  "api": {
+    "host": "localhost:3100/v1/",
+    "indexName": "foobar",  
+    "legacyUrl": "pelias.mapzen.com",
+    "relativeScores": true,
+    "textAnalyzer": "libpostal",
+    "pipService": "http://mypipservice.com/3000"
+  },
+  "interpolation": {
+    "client": {
+      "adapter": "http",
+      "host": "internal-pelias-interpolation-dev-130430937.us-east-1.elb.amazonaws.com"
+    }
+  },
+  "logger": {
+    "level": "debug"
+  }
+}
+```
+
 
 ## Contributing