migrate to asynchronous architecture

Cargo.toml

@@ -9,26 +9,28 @@ license = "MIT/Apache-2.0"
 readme = "README.md"
 repository = "https://github.com/euclio/aurelius"
 description = "A complete solution for previewing markdown."
-edition = "2018"
+edition = "2021"
 
 [dependencies]
-base64 = "0.11.0"
-buf_redux = "0.8.4"
-crossbeam-channel = "0.4.0"
-crossbeam-utils = "0.7.0"
+axum = { version = "0.5.9", default-features = false, features = ["headers", "http1", "ws"] }
+futures = "0.3.18"
+futures-util = "0.3.18"
 handlebars = "3.1.0"
-httparse = "1.3.4"
-include_dir = "0.5.0"
-log = "0.4"
+include_dir = "0.7.2"
 mime_guess = "2.0.1"
 pulldown-cmark = { version = "0.9.1", default-features = false }
 serde = { version = "1.0.104", features = ["derive"] }
-sha-1 = "0.8.1"
-tungstenite = { version = "0.9.2", default-features = false }
-url = { version = "2.1.0", features = ["serde"] }
+tokio = { version = "1.14.0", features = ["rt", "macros", "io-util", "process"] }
+tokio-util = { version = "0.7.3", features = ["compat", "io"] }
+tower = "0.4.13"
+tower-http = { version = "0.3.4", features = ["fs", "trace"] }
+tracing = { version = "0.1.35", features = ["log"] }
 
 [dev-dependencies]
-reqwest = { version = "0.10.1", default-features = false, features = ["blocking"] }
-tempfile = "3.1.0"
+anyhow = "1.0.56"
+async-tungstenite = { version = "0.17.1", features = ["tokio-runtime"] }
 matches = "0.1.8"
-socket2 = "0.3.11"
+reqwest = { version = "0.11.7" }
+tempfile = "3.1.0"
+tokio = { version = "1.14.0", features = ["rt", "macros", "net"] }
+tokio-test = "0.4.2"