Added Open API validator

.github/workflows/openapi_validation.yaml

@@ -0,0 +1,65 @@
+name: Validate OpenAPI
+
+on:
+  pull_request:
+    branches:
+      - master
+      - draft
+
+jobs:
+  validate_meta:
+    name: Meta OpenAPI Schema Validation
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Install Node.js and NPM
+        uses: actions/setup-node@v2
+        with:
+          node-version: 16
+
+      - name: Install IBM OpenAPI Validator
+        run: npm install -g @ibm-cloud/openapi-validator
+
+      - name: Validate OpenAPI schema for meta.yaml
+        run: openapi-validator ./api/meta/build/meta.yaml
+
+  validate_registry:
+    name: Registry OpenAPI Schema Validation
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Install Node.js and NPM
+        uses: actions/setup-node@v2
+        with:
+          node-version: 16
+
+      - name: Install IBM OpenAPI Validator
+        run: npm install -g @ibm-cloud/openapi-validator
+
+      - name: Validate OpenAPI schema for registry.yaml
+        run: openapi-validator ./api/registry/build/registry.yaml
+
+  validate_transaction:
+    name: Transaction OpenAPI Schema Validation
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Install Node.js and NPM
+        uses: actions/setup-node@v2
+        with:
+          node-version: 16
+
+      - name: Install IBM OpenAPI Validator
+        run: npm install -g @ibm-cloud/openapi-validator
+
+      - name: Validate OpenAPI schema for transaction.yaml
+        run: openapi-validator ./api/transaction/build/transaction.yaml