Added command line options doc

README.md

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-# ethfirewall
+# EthFirewall
+
 A transaction signing and firewall application to be used with a web3 provider.
+
+[EthFirewall Command Line Options](docs/Reference/EthFirewall-CLI.md)

docs/Reference/EthFirewall-CLI.md

@@ -0,0 +1,154 @@
+description: EthFirewall command line interface reference
+<!--- END of page meta data -->
+
+# EthFirewall Command Line
+
+This reference describes the syntax of the EthFirewall Command Line Interface (CLI) options.
+
+```
+ethfirewall --chain-id=<chainId> --downstream-http-port=<port> --key-file=<keyFile> --password-file=<passwordFile> [options]
+```
+
+Runs EthFirewall transaction signing and firewall application.
+
+## Options
+
+### chain-id
+
+Chain ID that is the intended recipient for the signed transactions. 
+
+#### Syntax 
+```
+--chain-id=<chainId>
+```
+
+#### Example 
+```
+--chain-id=2017
+```
+
+### downstream-http-host
+
+Endpoint to which received requests are forwarded. Default is `localhost`. 
+
+#### Syntax 
+```
+--downstream-http-host=<downstreamHttpHost>
+```
+
+#### Example 
+```
+--downstream-http-host=8.8.8.8
+```
+
+### downstream-http-port
+
+Endpoint to which received requests are forwarded. 
+
+#### Syntax 
+```
+--downstream-http-port=<downstreamHttpPort>
+```
+
+#### Example 
+```
+--downstream-http-port=6174
+```
+
+### downstream-http-request-timeout
+
+Timeout period (in milliseconds) for downstream requests. Default is 5000. 
+
+#### Syntax 
+```
+--downstream-http-request-timeout=<downstreamHttpRequestTimeout>
+```
+
+#### Example 
+```
+--downstream-http-request-timeout=3000
+```
+
+### http-listen-host
+
+Host on which JSON-RPC HTTP listens. Default is `localhost`. 
+
+#### Syntax 
+```
+--http-listen-host=<httpListenHost>
+```
+
+#### Example 
+```
+--http-listen-host=8.8.8.8
+```
+
+### http-listen-port
+
+Port on which JSON-RPC HTTP listens. Default is 8545. 
+
+#### Syntax 
+```
+--http-listen-port=<httpListenPort>
+```
+
+#### Example 
+```
+--http-lisentport=6174
+```
+
+### key-file
+
+File containing key used to sign transactions.  
+
+#### Syntax 
+```
+-k, --key-file=<keyFile>
+```
+
+#### Example 
+```
+--key-file=/Users/me/my_node/transactionKey
+```
+
+### password-file
+
+File containing password to decrypt the [key used to sign transactions](#key-file).  
+
+#### Syntax 
+```
+-k, --password-file=<passwordFile>
+```
+
+#### Example 
+```
+-p, --password-file=/Users/me/my_node/password
+```
+
+### logging
+
+Logging verbosity levels. Options are: `OFF`, `FATAL`, `WARN`, `INFO`, `DEBUG`, `TRACE`, `ALL`. The 
+default is `INFO`.  
+
+#### Syntax 
+```
+-l, --logging=<LOG VERBOSITY LEVEL>
+```
+
+### help
+
+Displays the help and exits.  
+
+#### Syntax 
+```
+-h, --help
+```
+
+### version
+
+Displays the version and exits.  
+
+#### Syntax 
+```
+-V, --version
+```