added Creating Cloudflare API token

Author: fire1ce

README.md

@@ -17,6 +17,19 @@
 - Cloudflare [api-token](https://dash.cloudflare.com/profile/api-tokens) with ZONE-DNS-EDIT Permissions
 - DNS Record must be pre created (api-token should only edit dns records)
 
+### Creating Cloudflare API token
+
+To create a CloudFlare API token for your DNS zone go to [https://dash.cloudflare.com/profile/api-tokens][cloudflare-api-token-url] and follow these steps:
+
+1. Click Create Token
+2. Select Create Custom Token
+3. Provide the token a name, for example, `example.com-dns-zone-readonly`
+4. Grant the token the following permissions:
+   - Zone - DNS - Read
+5. Set the zone resources to:
+   - Include - Specific Zone - `example.com`
+6. Complete the wizard and use the generated token at the `CLOUDFLARE_API_TOKEN` variable for the container
+
 ## Installation
 
 You can place the script at any location manually.
@@ -154,3 +167,10 @@ AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 IN THE SOFTWARE.
+
+<!-- urls -->
+<!-- appendices -->
+
+[cloudflare-api-token-url]: https://dash.cloudflare.com/profile/api-tokens 'Cloudflare API Token'
+
+<!-- end appendices -->