feat: body decoding

Cargo.toml

@@ -21,6 +21,7 @@ anyhow = "1.0.34"
 base64 = "0.13"
 candid = { version = "0.7.11", features = ["mute_warnings"] }
 clap = { version = "3", features = ["cargo", "derive"] }
+flate2 = "1.0.0"
 garcon = { version = "0.2.3", features = ["async"] }
 hex = "0.4.3"
 hyper = { version = "0.14.13", features = ["full"] }