add Cloudflare Pages to docs (getzola#1414)

docs/content/documentation/deployment/cloudflare-pages.md

@@ -0,0 +1,22 @@
++++
+title = "Cloudflare Pages"
+weight = 60
++++
+
+Cloudflare is a cloud solutions provider with a huge proprietary content delivery network. Like Netlify or Vercel Cloudflare Pages makes deployment process flexible and easy. You can add GitHub repo to the service and build&host Zola-bases websites after each PR automatically. 
+
+## Step-by-step
+
+1. Open or create the new one Cloudflare account and choice Pages on the right nav column
+2. Press the button _"Create a project"_
+3. Select the GitHub repo that contains your Zola website and connect it to Cloudflare Pages
+4. Click _"Begin setup"_
+5. Enter your project name and keep in mind, if you would like to use default Pages domain (pages.dev) it will be your website future URL, like `yourprojectname.pages.dev`. Also, select a production branch.
+6. In _Build settings_ select Zola as a _Framework preset_. _Build command_ and _Build output directory_ will be filled automatically. 
+7. Toggle _Environment variables_ below and add `ZOLA_VERSION` as _a variable name_ and `0.13.0` or an actual Zola's version as a _value_.
+8. Save and deploy.
+
+Your website is now built and deployed to Pages. You may add custom domain or change some settings in the Pages dashboard.
+
+Also, you may find well documented settings and howto [Getting started with Cloudflare Pages](https://developers.cloudflare.com/pages/getting-started) and
+[Deloying Zola with Cloudflare Pages](https://developers.cloudflare.com/pages/how-to/deploy-a-zola-site#deploying-with-cloudflare-pages) in Developers portal.