docs: describe the setup for a deployment workflow

Ref. #2

Author: peterschewe

README.md

@@ -43,7 +43,7 @@ Make sure all dependencies have been installed:
 Set up Contentful:
 
 - Create a new and preferably empty space.
-- Generate API Keys for content delivery and preview tokens.
+- Go to *"Settings > API keys"* and add an API key for content delivery and preview tokens.
 - Log in to your account by running `npx contentful-cli login`.
 
 ## Getting started
@@ -68,6 +68,36 @@ After that, you can try out the new app. To do so, change to the newly created d
 you selected. You can also start the Hugo development server by running `npm start`. However,
 you will only see an empty page because no entries have been created in Contentful yet.
 
+Nice job so far. Now you can easily deploy your site to Netlify.
+
+First, push the app to GitHub:
+
+```
+# Replace the origin with the correct URL to your repo
+git remote add origin [email protected]:{ACCOUNT}/{REPO}.git`
+git branch -M main
+git push -u origin main
+```
+
+Create and configure a continuous deployment for a new site in Netlify:
+
+- Log in to your account by running `npx netlify login`.
+- `npx netlify init` configures a continuous deployment for a new site.
+- And `npx netlify env:import .env` imports the current environment variables.
+
+And last but not least we set up a webhook in Contentful:
+
+- Netlify: Go to *"Site settings > Build & deploy > Build hooks"*, add a new build hook and copy it.
+- Contentful: Go to *"Settings > Webhooks"*, add a new webhook and change the following settings.
+  - URL: Paste the copied Netlify build hook URL
+  - Triggers: Select specific triggering events
+  - Content Events: Select only *Publish* and *Unpublish* for *Entry*
+  - Filter: Add a new filter *Entity ID (sys.id) equals* with *deploy-to-production*
+
+You are now ready to deploy. Open the *"Deploy to production"* content entry and click *Deploy*.
+Switch to Netlify and check whether the webhook has run in. The build should now start
+and after a short while... **Site is live ✨**
+
 ## Get involved
 
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