Europa docs: From local dev to CI environment doc page

The todoapp example contains a Netlify plan which uses the latest dagger
additions: do & Client API. We are thinking of merging the examples
repository into this one to make working with this easier. This is a
step in that direction.

We are not using the yarn package so that we can revert
https://github.com/dagger/dagger/pull/1673 without breaking this
implementation.

The GitHub Action is WIP, we will continue with that tomorrow:
https://github.com/dagger/dagger-for-github/issues/24

Signed-off-by: Gerhard Lazu <gerhard@lazu.co.uk>

pkg/universe.dagger.io/examples/todoapp/package.json

@@ -0,0 +1,38 @@
+{
+  "name": "moz-todo-react",
+  "version": "0.1.0",
+  "private": true,
+  "homepage": "./",
+  "dependencies": {
+    "@testing-library/jest-dom": "^4.2.4",
+    "@testing-library/react": "^9.3.2",
+    "@testing-library/user-event": "^7.1.2",
+    "gh-pages": "^3.2.3",
+    "nanoid": "^3.1.3",
+    "react": "^16.13.1",
+    "react-dom": "^16.13.1",
+    "react-scripts": "3.4.1"
+  },
+  "scripts": {
+    "start": "react-scripts start",
+    "build": "react-scripts build",
+    "test": "react-scripts test --watchAll=false --passWithNoTests",
+    "gh-pages": "gh-pages -d build -u 'github-actions-bot <support+actions@github.com>'",
+    "eject": "react-scripts eject"
+  },
+  "eslintConfig": {
+    "extends": "react-app"
+  },
+  "browserslist": {
+    "production": [
+      ">0.2%",
+      "not dead",
+      "not op_mini all"
+    ],
+    "development": [
+      "last 1 chrome version",
+      "last 1 firefox version",
+      "last 1 safari version"
+    ]
+  }
+}