[+] Add url, url-escape, duplicate dependencies

backend/Cargo.toml

@@ -11,6 +11,7 @@ path = "src/test.rs"
 
 [dependencies]
 anyhow = { version = "1.0.69", features = ["backtrace"] }
+duplicate = "0.4.1"
 hyper = { version = "0.14", features = ["full"] }
 log = "0.4.17"
 path-clean = "0.1.0"
@@ -20,4 +21,6 @@ serde = { version = "1", features = ["derive"] }
 serde_json = "1"
 shlex = "1.1.0"
 tokio = { version = "1", features = ["full"] }
+url = "2.3.1"
+url-escape = "0.1.1"
 xdg-mime = "0.3.3"