Run gh actions workflows on push as well (#386)

Author: Fawad Khaliq

.github/workflows/build.yml

@@ -1,5 +1,8 @@
 name: build
 on:
+  push:
+    branches:
+      - master
   pull_request:
     branches:
       - master

.github/workflows/integration-test.yaml

@@ -1,5 +1,8 @@
 name: integration-test
 on:
+  push:
+    branches:
+      - master
   pull_request:
     branches:
       - master

.github/workflows/unit-test.yml

@@ -1,5 +1,8 @@
 name: unit-test
 on:
+  push:
+    branches:
+      - master
   pull_request:
     branches:
       - master

docs/README.md

@@ -1,4 +1,9 @@
-![Build](https://github.com/aws/aws-app-mesh-controller-for-k8s/workflows/Build/badge.svg?branch=master)
+[![contributions welcome](https://img.shields.io/badge/contributions-welcome-brightgreen.svg?style=flat)](https://github.com/aws/aws-app-mesh-controller-for-k8s/issues)
+![GitHub issues](https://img.shields.io/github/issues-raw/aws/aws-app-mesh-controller-for-k8s?style=flat)
+![GitHub](https://img.shields.io/github/license/aws/aws-app-mesh-controller-for-k8s?style=flat)
+
+
+![Build](https://github.com/aws/aws-app-mesh-controller-for-k8s/workflows/build/badge.svg?branch=master)
 [![Go Report Card](https://goreportcard.com/badge/github.com/aws/aws-app-mesh-controller-for-k8s)](https://goreportcard.com/report/github.com/aws/aws-app-mesh-controller-for-k8s)
 
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