Kvg dep cache (#38)

* Cache Rust dependencies for faster builds

.github/workflows/ci_push.yml

@@ -13,6 +13,15 @@ jobs:
       run: git config --global --add safe.directory /__w/hidive/hidive
     - uses: 'actions/checkout@v3'
 
+    - name: Cache Rust dependencies
+      uses: actions/cache@v3
+      with:
+        path: |
+          ~/.cargo/registry
+          ~/.cargo/git
+          target
+        key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
+
     - name: Setup Rust
       uses: dtolnay/rust-toolchain@stable
       with:
@@ -51,7 +60,7 @@ jobs:
       run: gcloud auth configure-docker us.gcr.io -q
 
     - name: Build and push Docker image
-      uses: docker/build-push-action@v4
+      uses: docker/build-push-action@v5
       with:
         context: ./docker
         push: true