ci: cargo caching

.github/workflows/cd.yaml

@@ -23,6 +23,18 @@ jobs:
           node-version: 16
       - name: install Rust stable
         uses: dtolnay/rust-toolchain@stable
+      - name: Set up cargo cache
+        uses: actions/cache@v3
+        continue-on-error: false
+        with:
+          path: |
+            ~/.cargo/bin/
+            ~/.cargo/registry/index/
+            ~/.cargo/registry/cache/
+            ~/.cargo/git/db/
+            target/            
+          key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
+          restore-keys: ${{ runner.os }}-cargo-
       - name: install dependencies
         run: |
           sudo apt-get update

src-tauri/src/main.rs

@@ -145,7 +145,7 @@ async fn establish_heartbeat_connection(cluster_id: &str, token: &str) -> Result
             Ok(_) => Ok(()),
             Err(why) => {
                 println!("{}", why);
-                Err(format!("{}", why))
+                Err(why.to_string())
             }
         }
 }