Optimize binary size

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>

backend/Cargo.toml

@@ -4,10 +4,10 @@ version = "0.1.0"
 edition = "2021"
 
 [profile.release]
-panic = 'abort'
-
-[profile.dev]
-panic = 'abort'
+panic         = 'abort'
+strip         = true
+lto           = true
+codegen-units = 1
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
@@ -38,5 +38,4 @@ time = { version = "0.3.27", features = [
 futures = "0.3.28"
 websocket-util = "0.11.2"
 futures-util = "0.3.28"
-tungstenite = "0.20.0"
 async-trait = "0.1.73"