feat(backend) backed init

backend/Cargo.toml

@@ -0,0 +1,16 @@
+[package]
+name = "backend"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+axum = "0.7.5"
+dotenv = "0.15.0"
+serde = { version = "1.0.199", features = ["derive"] }
+serde_json = "1.0.116"
+tokio = { version = "1.37.0", features = ["full"] }
+uuid = { version = "1.8.0", features = ["v4", "fast-rng", "serde"] }
+sqlx = { version = "0.7.4", features = ["runtime-tokio", "tls-native-tls", "postgres", "chrono", "uuid"] }
+chrono = { version = "0.4.38", features = ["serde"] }