update server-configuration docs

docs/server-configuration.md

@@ -6,6 +6,47 @@ An example configuration file is provided [here](../config-example.json).
 
 ----------
 
+### Version 2.0.3
+
+### Changes
+
++ Add `proxy` property that provides ripple-lib with a proxy url to route websocket connections to rippled through
+
+```js
+{
+  'config_version': '2.0.2',
+  'debug': false,
+  'port': 5990,
+  'host': 'localhost',
+  'ssl_enabled': false,
+  'ssl': {
+    'key_path': './certs/server.key',
+    'cert_path': './certs/server.crt'
+  },
+  'db_path': './ripple-rest.db',
+  'max_transaction_fee': 1000000,
+  'proxy': 'http://username:password@0.0.0.0:3128'
+  'rippled_servers': [
+    'wss://s1.ripple.com:443'
+  ],
+  'url_base': 'https://api.ripple.com:443'
+}
+```
+
++ `config_version` - will be checked by the configuration loader and it will throw an error if there have been breaking changes to the format
++ `port` - the port that the API server will be available on
++ `host` - the host the API server will be available on
++ `dp_path` - path for sqlite3 to save the database to. Can be populated with `:memory:` to run an in-memory version of the sqlite db
++ `ssl_enabled` - boolean to configure to server to host over SSL
++ `ssl` - if an object with `key_path` and `cert_path` are provided, the API server will be available over HTTPS
++ `max_transaction_fee` - the maximum fee you're willing to pay for a transaction, has to be a `Number`
++ `rippled_servers` - an array of server objects indicating which `rippled` servers the API should connect to. These should be configured to point to your local `rippled` if you are running one, instead of `s_west.ripple.com`
++ `proxy` - the url of a proxy server. Connections to the rippled_servers will be routed through here
++ `debug` - boolean to log debugging information
++ `url_base` - override the url base (protocol://host_name:port) that is used in url construction for rest responses
+
+----------
+
 ### Version 2.0.2
 
 ### Changes
@@ -191,4 +232,4 @@ An example configuration file is provided [here](../config-example.json).
 + `ssl` - if an object with `key_path` and `cert_path` are provided, the API server will be available over HTTPS
 + `rippled_servers` - an array of server objects indicating which `rippled` servers the API should connect to. These should be configured to point to your local `rippled` if you are running one, instead of `s_west.ripple.com`
 
-----------
+----------