Add spec

Author: Stefan Wille

myapi.yaml

@@ -0,0 +1,14 @@
+openapi: 3.0.0
+info:
+  version: 1.0.0
+  title: My API
+  description: An OpenAPI example API
+paths:
+  /posts:
+    get:
+      description: Returns all posts
+      responses:
+        '200':
+          description: Successful response
+
+

package.json

@@ -18,6 +18,7 @@
     "web-vitals": "^1.0.1"
   },
   "scripts": {
+    "codegen": "openapi-generator-cli generate -i ./myapi.yaml -g typescript-fetch -o generated-sources/openapi --additional-properties=supportsES6=true,npmVersion=6.9.0",
     "start": "react-scripts start",
     "build": "react-scripts build",
     "test": "react-scripts test",