Add end-to-end test with docker compose and sample attester

.github/workflows/kbs-docker-e2e.yaml

@@ -0,0 +1,61 @@
+name: KBS End-to-End test with Docker Compose and Sample Attester
+
+on:
+  pull_request:
+    branches: 
+      - main
+
+env:
+  TEST_SECRET_CONTENT: shhhhh
+  TEST_SECRET_PATH: test-org/test-repo/test-secret
+
+jobs:
+  e2e-test:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout KBS
+      uses: actions/checkout@v4
+
+    - name: Install Rust (for client)
+      uses: actions-rs/toolchain@v1
+      with:
+        profile: minimal
+        toolchain: stable
+
+    - name: Build client
+      uses: actions-rs/cargo@v1
+      with:
+        command: build
+        args: --manifest-path kbs/tools/client/Cargo.toml --no-default-features --features sample_only --release
+
+    - name: Setup Keys
+      run: | 
+        openssl genpkey -algorithm ed25519 > kbs/config/private.key
+        openssl pkey -in kbs/config/private.key -pubout -out kbs/config/public.pub
+
+    - name: Build KBS Cluster
+      run: docker compose build
+
+    - name: Start KBS cluster
+      run: docker compose up -d
+
+    - name: Set Resource
+      working-directory: target/release/
+      run: |
+        echo "$TEST_SECRET_CONTENT" > test-secret
+        ./kbs-client --url http://127.0.0.1:8080 config --auth-private-key ../../kbs/config/private.key  set-resource --path "$TEST_SECRET_PATH" --resource-file test-secret
+
+    - name: Get Resource (negative)
+      working-directory: target/release/
+      run: |
+        ! ./kbs-client --url http://127.0.0.1:8080 get-resource --path "$TEST_SECRET_PATH"
+
+    - name: Update policy
+      working-directory: target/release/
+      run: ./kbs-client --url http://127.0.0.1:8080 config --auth-private-key ../../kbs/config/private.key  set-resource-policy --policy-file "$policy_path"
+      env:
+        policy_path: ../../kbs/test/data/policy_2.rego
+
+    - name: Get Resource
+      working-directory: target/release/
+      run: ./kbs-client --url http://127.0.0.1:8080 get-resource --path "$TEST_SECRET_PATH"