Remove all unwraps, so code won't panic in some cases

src/main.rs

@@ -64,11 +64,22 @@ pub extern "win64" fn uefi_start(_image: uefi::Handle, table: SystemTable<Boot>)
         match result {
             Ok(file) => {
                 let mut file = file.unwrap();
-
-                // TODO: Don't panic here
-                let size = file.read(&mut buf).unwrap().unwrap();
-                // TODO: Don't panic here too
-                config = from_slice(&buf[..size]).unwrap();
+                let result = file.read(&mut buf);
+                match result {
+                    Ok(size) => {
+                        let size = size.unwrap();
+                        if let Ok(c) = from_slice::<Configuration>(&buf[..size]) {
+                            config = c;
+                        } else {
+                            error!("Failed to parse configuration file");
+                            info!("Using default configuration instead");
+                        }
+                    }
+                    Err(_) => {
+                        error!("Failed to read configuration, file is too large");
+                        info!("Using default configuration instead");
+                    }
+                }
             }
             Err(_) => {
                 warn!("\\EFI\\COONBOOT\\boot.json not found, using default configuration");