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Set up Python 2 on macOS

Install pyenv:

brew install pyenv

Create symbolic link:

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import { WebView } from 'react-native-webview';

export default function App() {
  return (
    <WebView
      source={{ uri: 'https://example.com/' }}
      style={{ marginTop: 20 }}
    />
  );
}

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{
  "public": "dist",
  "rewrites": [{ "source": "**", "destination": "/index.html" }],
  "headers": [
    {
      "source": "**",
      "headers": [
        {
          "key": "Cache-Control",
          "value": "public, max-age=0, must-revalidate"

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{
  "scripts": {
    "build": "parcel build",
    "start": "serve"
  },
  "dependencies": {
    "serve": "latest"
  }
}

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name: Heroku Pull Request
on:
  pull_request:
    types: [opened, synchronize, reopened, closed]

jobs:
  heroku-pull-request:
    runs-on: ubuntu-latest
    env:
      HEROKU_APP_NAME: my-app-pr-${{ github.event.number }}

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- name: Destroy Heroku app
  if: github.event.action == 'closed'
  run: heroku apps:destroy --app=${{ env.HEROKU_APP_NAME }} --confirm=${{ env.HEROKU_APP_NAME }}

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- name: Add comment to PR
  if: github.event.action == 'opened'
  run: |
    gh pr comment ${{ github.event.number }} --body '[Heroku app](https://dashboard.heroku.com/apps/${{ env.HEROKU_APP_NAME }}): https://${{ env.HEROKU_APP_NAME }}.herokuapp.com'
  env:
    GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

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- name: Push to Heroku
  run: git push heroku ${{ github.head_ref }}:master --force

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- name: Add Heroku remote
  run: heroku git:remote --app=${{ env.HEROKU_APP_NAME }}

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- name: Copy environment variables to Heroku app
  if: github.event.action == 'opened'
  run: |
    heroku config --shell --app=my-development-app > .env
    cat .env | tr '\n' ' ' | xargs heroku config:set --app=${{ env.HEROKU_APP_NAME }}