Added Graphql options (#1496)

* Added GraphQL options
Signed-off-by: Adrian Sutton <adrian.sutton@consensys.net>

docs/Getting-Started/Run-Docker-Image.md

@@ -214,11 +214,11 @@ Where `myauthconfig.toml` is the credentials file and `path` is the absolute pat
 
 ## Exposing Ports
 
-Expose ports for P2P peer discovery, metrics, and HTTP and WebSockets JSON-RPC. This is required to use the 
+Expose ports for P2P peer discovery, GraphQL, metrics, and HTTP and WebSockets JSON-RPC. This is required to use the 
 defaults ports or specify different ports (the equivalent of specifying the [`--rpc-http-port`](../Reference/Pantheon-CLI-Syntax.md#rpc-http-port), 
 [`--p2p-port`](../Reference/Pantheon-CLI-Syntax.md#p2p-port), [`--rpc-ws-port`](../Reference/Pantheon-CLI-Syntax.md#rpc-ws-port), 
-[`--metrics-port`](../Reference/Pantheon-CLI-Syntax.md#metrics-port), and [`--metrics-push-port`](../Reference/Pantheon-CLI-Syntax.md#metrics-push-port) 
-options).
+[`--metrics-port`](../Reference/Pantheon-CLI-Syntax.md#metrics-port), [`--graphql-http-port`](../Reference/Pantheon-CLI-Syntax.md#graphql-http-port), 
+and [`--metrics-push-port`](../Reference/Pantheon-CLI-Syntax.md#metrics-push-port) options).
 
 To run Pantheon exposing local ports for access: 
 ```bash

docs/Pantheon-API/GraphQL.md

@@ -7,6 +7,7 @@ GraphQL can reduce the overhead needed for common queries. For example, instead
 block, GraphQL can obtain the same result with a single query for the entire block. 
 
 The GraphQL implementation for Ethereum is described in the [schema](https://github.com/PegaSysEng/pantheon/blob/master/ethereum/graphqlrpc/src/main/resources/schema.graphqls). 
+The GraphQL service is enabled using the [command line options](../Pantheon-API#enabling-api-access).
 
 !!! note
     GraphQL is not supported over WebSockets. 

docs/Reference/Pantheon-CLI-Syntax.md

@@ -143,6 +143,80 @@ The path to the genesis file.
 !!!note
     This option is not used when running Pantheon from the [Docker image](../Getting-Started/Run-Docker-Image.md#custom-genesis-file). 
 
+
+### graphql-http-cors-origins
+
+```bash tab="Syntax"
+--graphql-http-cors-origins=<graphQLHttpCorsAllowedOrigins>
+```
+
+```bash tab="Example Command Line"
+--graphql-http-cors-origins="http://medomain.com","https://meotherdomain.com"
+```
+
+```bash tab="Example Configuration File"
+graphql-http-cors-origins=["http://medomain.com","https://meotherdomain.com"]
+```
+
+Comma separated origin domain URLs for CORS validation. The default is none. 
+
+### graphql-http-enabled
+
+```bash tab="Syntax"
+--graphql-http-enabled
+```
+
+```bash tab="Example Configuration File"
+graphql-http-enabled=true
+```
+
+Set to `true` to enable the GraphQL HTTP service.
+The default is `false`.
+
+### graphql-http-host
+
+```bash tab="Syntax"
+--graphql-http-host=<HOST>
+```
+
+```bash tab="Example Command Line"
+# to listen on all interfaces
+--graphql-http-host=0.0.0.0
+```
+
+```bash tab="Example Configuration File"
+graphql-http-host="0.0.0.0"
+```
+
+Host for GraphQL HTTP to listen on.
+The default is 127.0.0.1.
+
+To allow remote connections, set to `0.0.0.0`
+
+!!!note
+    This option is not used when running Pantheon from the [Docker image](../Getting-Started/Run-Docker-Image.md#exposing-ports). 
+    
+### graphql-http-port
+
+```bash tab="Syntax"
+--graphql-http-port=<PORT>
+```
+
+```bash tab="Example Command Line"
+# to listen on port 6175
+--graphql-http-port=6175
+```
+
+```bash tab="Example Configuration File"
+graphql-http-port="6175"
+```
+
+Specifies GraphQL HTTP listening port (TCP).
+The default is 8547. Ports must be [exposed appropriately](../Configuring-Pantheon/Networking/Configuring-Ports.md).
+
+!!!note
+    This option is not used when running Pantheon from the [Docker image](../Getting-Started/Run-Docker-Image.md#exposing-ports). 
+
 ### host-whitelist
 
 ```bash tab="Syntax"