change server bind address (#403)

* web/mod.rs - change server bind address

127.0.0.1 is a loopback interface, and only works on the same host
0.0.0.0 will allow connections from other hosts

ideally, this should be a console arg - but it's a quick fix

* implement --address option, revert default bind address to 127.0.0.1

* revert silly autoformatting

* ok, actually using rustfmt now

* More precise --address flag description

* Use SocketAddr where available, take advantage of const-ness

* Display 'localhost' if address is loopback

* Update Changelog

Co-authored-by: Lucien Greathouse <me@lpghatguy.com>

src/cli/mod.rs

@@ -12,6 +12,7 @@ use std::{
     env,
     error::Error,
     fmt,
+    net::IpAddr,
     path::{Path, PathBuf},
     str::FromStr,
 };
@@ -186,7 +187,11 @@ pub struct ServeCommand {
     #[structopt(default_value = "")]
     pub project: PathBuf,
 
-    /// The port to listen on. Defaults to the project's preference, or 34872 if
+    /// The IP address to listen on. Defaults to `127.0.0.1`.
+    #[structopt(long)]
+    pub address: Option<IpAddr>,
+
+    /// The port to listen on. Defaults to the project's preference, or `34872` if
     /// it has none.
     #[structopt(long)]
     pub port: Option<u16>,