Add basic apphosting.yaml in next.js and angular starter templates. (#255)

* Add basic apphosting.yaml in next.js and angular starter templates.

* Use default values as example.

Author: taeold

starters/angular/basic/apphosting.yaml

@@ -0,0 +1,23 @@
+# Settings for Backend (on Cloud Run).
+# See https://firebase.google.com/docs/app-hosting/configure#cloud-run.
+runConfig:
+  minInstances: 0
+  # maxInstances: 100
+  # concurrency: 80
+  # cpu: 1
+  # memoryMiB: 512
+
+# Environment variables and secrets.
+# env:
+  # Configure environment variables.
+  # See https://firebase.google.com/docs/app-hosting/configure#user-defined-environment.
+  # - variable: MESSAGE
+  #   value: Hello world!
+  #   availability:
+  #     - BUILD
+  #     - RUNTIME
+
+  # Configure secrets
+  # See https://firebase.google.com/docs/app-hosting/configure#secret-parameters
+  # - variable: API_KEY
+  #   secret: myApiKeySecret

starters/nextjs/basic/apphosting.yaml

@@ -0,0 +1,23 @@
+# Settings for Backend (on Cloud Run).
+# See https://firebase.google.com/docs/app-hosting/configure#cloud-run.
+runConfig:
+  minInstances: 0
+  # maxInstances: 100
+  # concurrency: 80
+  # cpu: 1
+  # memoryMiB: 512
+
+# Environment variables and secrets.
+env:
+  # Configure environment variables.
+  # See https://firebase.google.com/docs/app-hosting/configure#user-defined-environment.
+  - variable: MESSAGE
+    value: Hello world!
+    availability:
+      - BUILD
+      - RUNTIME
+
+  # Configure secrets
+  # See https://firebase.google.com/docs/app-hosting/configure#secret-parameters
+  # - variable: API_KEY
+  #   secret: myApiKeySecret

starters/nextjs/basic/src/app/page.tsx

@@ -1,9 +1,11 @@
 import Link from "next/link";
 
 export default function Home() {
+  const message = process.env["MESSAGE"] || "Hello!";
   return (
     <main className="content">
       <h1 className="heading">Next.js on Firebase App Hosting</h1>
+      <p>{message}</p>
 
       <section className="features">
         <article className="card">