feat: APIM example doc (#225)

Author: tbarlow12

README.md

@@ -200,6 +200,9 @@ The getting started walkthrough illustrates the interactive login experience, wh
     $env:azureServicePrincipalPassword='<password>'
     ```
 
+### Example Usage
+- [Configuring API Management](docs/examples/apim.md) that sits in front of function app
+
 ### Contributing
 
 Please create issues in this repo for any problems or questions you find. Before sending a PR for any major changes, please create an issue to discuss.

docs/examples/apim.md

@@ -0,0 +1,84 @@
+# API Management
+
+[API Management](https://azure.microsoft.com/en-us/services/api-management/) is an Azure Service for publishing, managing, securing and monitoring APIs. It can be deployed along with your Serverless function app by specifying its configuration in `serverless.yml`. Here is a basic example of how to configure API Mangement:
+
+## Simple Handler
+
+```yaml
+service: greeter
+
+provider:
+  prefix: greeter
+  name: azure
+  # Default to West US, allow for command line arg --region to override
+  region: ${opt:region, 'westus'}
+  # Default to dev, allow for command line arg -- stage to override
+  stage: ${opt:stage, 'dev'}
+  # Azure subscription ID for deployment
+  subscriptionId: 00000000-0000-0000-0000-000000000000
+
+  # Start of your API Management configuration
+  apim:
+    # API specifications
+    api:
+      # Name of the API
+      name: v1
+      subscriptionRequired: false
+      # Display name
+      displayName: v1
+      # Description of API
+      description: V1 sample app APIs
+      # HTTP protocols allowed
+      protocols:
+        - https
+      # Base path of API calls
+      path: v1
+      # Tags for ARM resource
+      tags:
+        - tag1
+        - tag2
+      # No authorization
+      authorization: none
+    # CORS Settings for APIM
+    cors:
+      allowCredentials: false
+      allowedOrigins:
+        - "*"
+      allowedMethods:
+        - GET
+        - POST
+        - PUT
+        - DELETE
+        - PATCH
+      allowedHeaders:
+        - "*"
+      exposeHeaders:
+        - "*"
+
+plugins:
+  - serverless-azure-functions
+
+functions:
+  hello:
+    handler: src/handlers/hello.handler
+
+    # API Management configuration for `hello` handler
+    apim:
+      operations:
+        # GET operation for `hello` handler
+        - method: get
+          # URL path for accessing handler
+          urlTemplate: /hello
+          # Display name inside Azure Portal
+          displayName: Hello
+    events:
+      - http: true
+        x-azure-settings:
+          methods:
+            - GET
+          authLevel : function
+      - http: true
+        x-azure-settings:
+          direction: out
+          name: res
+```