chore: add example for rocket

Cargo.toml

@@ -3,4 +3,5 @@ members = [
     "itconfig",
     "itconfig_tests",
     "examples/diesel",
+    "examples/rocket",
 ]

examples/rocket/Cargo.toml

@@ -0,0 +1,11 @@
+[package]
+name = "rocket"
+version = "0.1.0"
+authors = ["Dmitriy Pleshevskiy <dmitriy@ideascup.me>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+rocket = "0.4.2"
+itconfig = { path = '../../itconfig' }

examples/rocket/src/main.rs

@@ -0,0 +1,36 @@
+#![feature(proc_macro_hygiene, decl_macro)]
+
+#[macro_use]
+extern crate rocket;
+#[macro_use]
+extern crate itconfig;
+
+use rocket::config::{Config, Environment};
+
+config! {
+    ROCKET {
+        HOST: String => "localhost".to_string(),
+        PORT: u16 => 8000,
+        BASE_URL: String => "/".to_string(),
+    }
+}
+
+
+#[get("/")]
+fn index() -> &'static str {
+    "Hello, world!"
+}
+
+fn main() {
+    cfg::init();
+
+    let config = Config::build(Environment::Staging)
+        .address(cfg::ROCKET::HOST())
+        .port(cfg::ROCKET::PORT())
+        .finalize()
+        .unwrap();
+
+    rocket::custom(config)
+        .mount(&cfg::ROCKET::BASE_URL(), routes![index])
+        .launch();
+}