Add server initialisation

backend/sync_server/src/main.rs

@@ -0,0 +1,27 @@
+mod app_state;
+mod config;
+mod consts;
+mod database;
+mod errors;
+mod server;
+
+use anyhow::{Context, Result};
+use app_state::AppState;
+use errors::{init_error, SyncServerError};
+use server::create_server;
+use std::sync::Arc;
+
+#[tokio::main]
+async fn main() -> Result<(), SyncServerError> {
+    tracing_subscriber::fmt::init();
+
+    let app_state = AppState::try_new()
+        .await
+        .context("Failed to initialise app state")
+        .map_err(init_error)?;
+
+    create_server(app_state)
+        .await
+        .context("Failed to start server")
+        .map_err(init_error)
+}