Add server initialisation

backend/sync_server/src/app_state.rs

@@ -0,0 +1,19 @@
+use crate::{config::Config, consts::CONFIG_PATH, database::Database};
+use anyhow::Result;
+
+#[derive(Clone, Debug)]
+pub struct AppState {
+    pub config: Config,
+    pub database: Database,
+}
+
+impl AppState {
+    pub async fn try_new() -> Result<Self> {
+        let path = std::path::Path::new(CONFIG_PATH);
+
+        let config = Config::read(path).await?;
+        let database = Database::try_new(&config.database).await?;
+
+        Ok(Self { config, database })
+    }
+}