Add readme with instructions

Signed-off-by: nain-F49FF806 <[email protected]>

mediator/README.md

@@ -0,0 +1,46 @@
+# Aries VCX Mediator
+
+A mediator service for Aries Agents.
+
+**Status**: Dev
+
+## Build
+
+This project depends on `aries-vcx` and is tightly integrated to work with it.
+As such we expect this `mediator` module to be in a subdirectory of aries-vcx repo.
+You may transplant it, but expect to change the `Cargo.toml` and adjust the dependencies on aries modules manually.
+
+When ready it's simple to build.
+
+```bash
+# Dev environment build
+cargo build
+```
+
+## Usage
+
+You can run and test the produced binary using cargo.
+
+```bash
+cargo run
+```
+
+### Configurable Options
+
+Currently the mediator reads the following environment variables.
+
+```yaml
+`ENDPOINT_ROOT`: 
+- **Description**: This is the address at which the mediator will listen for connections.
+- **Default**: "127.0.0.1:8005"
+- **Usage**: `ENDPOINT_ROOT=127.0.0.1:3000 cargo run`
+```
+
+## API
+
+Currently exposed endpoints.
+
+```yaml
+`/register`:
+- **Description** : Shows an Aries Out Of Band (OOB) invitation which can be used to connect to the mediator using a conformant Aries Agent.
+```

mediator/src/main.rs

@@ -5,7 +5,7 @@ async fn main() {
     println!("Hello, world!");
     load_dot_env();
     setup_logging();
-    let endpoint_root = std::env::var("ENDPOINT_ROOT").unwrap_or("0.0.0.0:8005".into());
+    let endpoint_root = std::env::var("ENDPOINT_ROOT").unwrap_or("127.0.0.1:8005".into());
     info!("Endpoint root address {}", endpoint_root);
     let app_router = mediator::routes::build_router(&endpoint_root).await;
     axum::Server::bind(

mediator/src/routes.rs

@@ -3,7 +3,7 @@ use std::sync::Arc;
 use aries_vcx_core::wallet::indy::IndySdkWallet;
 use axum::extract::State;
 use axum::response::Html;
-use axum::routing::{get, post};
+use axum::routing::get;
 use axum::Router;
 use axum_macros::debug_handler;
 
@@ -27,13 +27,18 @@ pub async fn oob_invite_qr(State(agent): State<Arc<Agent<IndySdkWallet>>>) -> Ht
     ))
 }
 
+pub async fn readme() -> Html<String> {
+    Html("<p>Please refer to the API section of <a>readme</a> for usage. Thanks. </p>".into())
+}
+
 pub async fn build_router(endpoint_root: &str) -> Router {
     let mut agent = Agent::new_demo_agent().await.unwrap();
     agent
         .init_service(vec![], format!("http://{endpoint_root}").parse().unwrap())
         .await
         .unwrap();
     Router::default()
+        .route("/", get(readme))
         .route("/register", get(oob_invite_qr))
         .layer(tower_http::catch_panic::CatchPanicLayer::new())
         .with_state(Arc::new(agent))