📘 Update README

README.md

@@ -1,28 +1,38 @@
 ## cf-check
-Check an IP is Owned by Cloudflare.
+Check an Host is Owned by CloudFlare.
 
 ## Install
 ```
 ▶ go get -u github.com/dwisiswant0/cf-check
 ```
 
 ## Usage
+
 ```
 ▶ echo "uber.com" | cf-check
 ```
 
+or
+
+```
+▶ cf-check -d <FILE>
+```
+
 ### Flags
 
 ```
+Usage of cf-check:
   -c int
-        Set the concurrency level (default 20)
-  -d    Prints domain instead of IP address
+        Set the concurrency level (default: 20)
+  -cf
+        Show CloudFlare only
+  -d    Print domains instead of IP addresses
 ```
 
 ## Workaround
 
 The goal is that you don't need to do a port scan if it's proven that the IP is owned by Cloudflare.
 
 ```
-▶ subfinder -silent -d uber.com | filter-resolved | cf-check | sort -u | naabu -silent -verify | httprobe
+▶ subfinder -silent -d uber.com | filter-resolved | cf-check | anew | naabu -silent -verify | httpx -silent
 ```