Redirect deprecated Let's Encrypt Pages docs to new page

doc/user/project/pages/lets_encrypt_for_gitlab_pages.md

 ---
-stage: Release
-group: Release
-info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#assignments
-description: "How to secure GitLab Pages websites with Let's Encrypt (manual process, deprecated)."
+redirect_to: 'custom_domains_ssl_tls_certification/lets_encrypt_integration.md'
+remove_date: '2022-03-14'
 ---
 
-# Let's Encrypt for GitLab Pages (manual process, deprecated) **(FREE)**
+This file was moved to [another location](custom_domains_ssl_tls_certification/lets_encrypt_integration.md).
 
-WARNING:
-This method is still valid but was **deprecated** in favor of the
-[Let's Encrypt integration](custom_domains_ssl_tls_certification/lets_encrypt_integration.md)
-introduced in GitLab 12.1.
-
-If you have a GitLab Pages website served under your own domain,
-you might want to secure it with a SSL/TLS certificate.
-
-[Let's Encrypt](https://letsencrypt.org) is a free, automated, and
-open source Certificate Authority.
-
-## Requirements
-
-To follow along with this tutorial, we assume you already have:
-
-- [Created a project](index.md#getting-started) in GitLab
-  containing your website's source code.
-- Acquired a domain (`example.com`) and added a [DNS entry](custom_domains_ssl_tls_certification/index.md#set-up-pages-with-a-custom-domain)
-  pointing it to your Pages website.
-- [Added your domain to your Pages project](custom_domains_ssl_tls_certification/index.md#steps)
-  and verified your ownership.
-- Cloned your project into your computer.
-- Your website up and running, served under HTTP protocol at `http://example.com`.
-
-## Obtaining a Let's Encrypt certificate
-
-Once you have the requirements addressed, follow the instructions
-below to learn how to obtain the certificate.
-
-Note that these instructions were tested on macOS Mojave. For other operating systems the steps
-might be slightly different. Follow the
-[CertBot instructions](https://certbot.eff.org/) according to your OS.
-
-1. On your computer, open a terminal and navigate to your repository's
-   root directory:
-
-   ```shell
-   cd path/to/dir
-   ```
-
-1. Install CertBot (the tool Let's Encrypt uses to issue certificates):
-
-   ```shell
-   brew install certbot
-   ```
-
-1. Request a certificate for your domain (`example.com`) and
-   provide an email account (`your@email.com`) to receive notifications:
-
-   ```shell
-   sudo certbot certonly -a manual -d example.com --email your@email.com
-   ```
-
-   Alternatively, you can register without adding an email account,
-   but you aren't notified about the certificate expiration's date:
-
-   ```shell
-   sudo certbot certonly -a manual -d example.com --register-unsafely-without-email
-   ```
-
-   NOTE:
-   Read through CertBot's documentation on their
-   [command line options](https://eff-certbot.readthedocs.io/using.html#certbot-command-line-options).
-
-1. You're prompted with a message to agree with their terms.
-   Press `A` to agree and `Y` to let they log your IP.
-
-   CertBot then prompts you with the following message:
-
-   ```shell
-   Create a file containing just this data:
-
-   Rxnv6WKo95hsuLVX3osmT6LgmzsJKSaK9htlPToohOP.HUGNKk82jlsmOOfphlt8Jy69iuglsn095nxOMH9j3Yb
-
-   And make it available on your web server at this URL:
-
-   http://example.com/.well-known/acme-challenge/Rxnv6WKo95hsuLVX3osmT6LgmzsJKSaK9htlPToohOP
-
-   Press Enter to Continue
-   ```
-
-1. **Do not press Enter yet.** Let's Encrypt needs to verify your
-   domain ownership before issuing the certificate. To do so, create 3
-   consecutive directories under your website's root:
-   `/.well-known/acme-challenge/Rxnv6WKo95hsuLVX3osmT6LgmzsJKSaK9htlPToohOP/`
-   and add to the last folder an `index.html` file containing the content
-   referred on the previous prompt message:
-
-   ```shell
-   Rxnv6WKo95hsuLVX3osmT6LgmzsJKSaK9htlPToohOP.HUGNKk82jlsmOOfphlt8Jy69iuglsn095nxOMH9j3Yb
-   ```
-
-   Note that this file needs to be accessed under
-   `http://example.com/.well-known/acme-challenge/Rxnv6WKo95hsuLVX3osmT6LgmzsJKSaK9htlPToohOP`
-   to allow Let's Encrypt to verify the ownership of your domain,
-   therefore, it needs to be part of the website content under the
-   repository's [`public`](index.md#how-it-works) folder.
-
-1. Add, commit, and push the file into your repository in GitLab. Once the pipeline
-   passes, press **Enter** on your terminal to continue issuing your
-   certificate. CertBot then prompts you with the following message:
-
-   ```shell
-   Waiting for verification...
-   Cleaning up challenges
-
-   IMPORTANT NOTES:
-    - Congratulations! Your certificate and chain have been saved at:
-      /etc/letsencrypt/live/example.com/fullchain.pem
-      Your key file has been saved at:
-      /etc/letsencrypt/live/example.com/privkey.pem
-      Your cert will expire on 2019-03-12. To obtain a new or tweaked
-      version of this certificate in the future, simply run certbot
-      again. To non-interactively renew *all* of your certificates, run
-      "certbot renew"
-    - If you like Certbot, please consider supporting our work by:
-
-      Donating to ISRG / Let's Encrypt:   https://letsencrypt.org/donate
-      Donating to EFF:                    https://eff.org/donate-le
-   ```
-
-## Add your certificate to GitLab Pages
-
-Now that your certificate has been issued, let's add it to your Pages site:
-
-1. Back at GitLab, navigate to your project's **Settings > Pages**,
-   find your domain and click **Details** and **Edit** to add your certificate.
-1. From your terminal, copy and paste the certificate into the first field
-   **Certificate (PEM)**:
-
-   ```shell
-   sudo cat /etc/letsencrypt/live/example.com/fullchain.pem | pbcopy
-   ```
-
-1. Copy and paste the private key into the second field **Key (PEM)**:
-
-   ```shell
-   sudo cat /etc/letsencrypt/live/example.com/privkey.pem | pbcopy
-   ```
-
-1. Click **Save changes** to apply them to your website.
-1. Wait a few minutes for the configuration changes to take effect.
-1. Visit your website at `https://example.com`.
-
-To force `https` connections on your site, navigate to your
-project's **Settings > Pages** and check **Force HTTPS (requires
-valid certificates)**.
-
-## Renewal
-
-Let's Encrypt certificates expire every 90 days and you must
-renew them periodically. To renew all your certificates at once, run:
-
-```shell
-sudo certbot renew
-```
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