Update README.md

README.md

@@ -1,9 +1,65 @@
 [![Go Reference](https://pkg.go.dev/badge/aead.dev/minisign.svg)](https://pkg.go.dev/aead.dev/minisign)
 
 # minisign
-minisign is a dead simple tool to sign files and verify signatures.  
+minisign is a dead simple tool to sign files and verify signatures.
+
+```
+$ minisign -G                                                                                  
+Please enter a password to protect the secret key.
+
+Enter Password: 
+Enter Password (one more time): 
+Deriving a key from the password in order to encrypt the secret key... done
+
+The secret key was saved as ~/.minisign/minisign.key - Keep it secret!
+The public key was saved as minisign.pub - That one can be public.
+
+Files signed using this key pair can be verified with the following command:
+
+minisign -Vm <file> -P RWSYKA736yqh+JrZ7cRDdWgck/WKtwW9ATBFmk8pQ1lHeUKXtV6uJ7Fu
+```
+```
+$ minisign -Sm message.txt
+Enter password: 
+Deriving a key from the password in order to decrypt the secret key... done
+```
+```
+$ minisign -Vm message.txt
+Signature and comment signature verified
+Trusted comment: timestamp:1614718943	filename:message.txt
+```
+
 This is a Go implementation of the [original C implementation](https://github.com/jedisct1/minisign) by [Frank Denis](https://github.com/jedisct1).
 
+## Usage
+
+```
+Usage:
+    minisign -G -p <pubKey> -s <secKey>
+    minisign -S [-H] [-x <signature>] [-s <secKey>] [-c <comment>] [-t <comment>] -m <file>...
+    minisign -V [-x <signature>] [-p <pubKey> | -P <pubKey>] [-o] [-q | -Q ] -m <file>
+    minisign -R -s <secKey> -p <pubKey>
+ 
+Options:
+    -G               Generate a new public/secret key pair.       
+    -S               Sign files with a secret key.
+    -V               Verify files with a public key.
+    -m <file>        The file to sign or verify.
+    -o               Combined with -V, output the file after verification.
+    -H               Combined with -S, pre-hash in order to sign large files.
+    -p <pubKey>      Public key file (default: ./minisign.pub)
+    -P <pubKey>      Public key as base64 string
+    -s <secKey>      Secret key file (default: $HOME/.minisign/minisign.key)
+    -x <signature>   Signature file (default: <file>.minisig)
+    -c <comment>     Add a one-line untrusted comment.
+    -t <comment>     Add a one-line trusted comment.
+    -q               Quiet mode. Suppress output.
+    -Q               Pretty quiet mode. Combined with -V, only print the trusted comment.
+    -R               Re-create a public key file from a secret key.
+    -f               Combined with -G or -R, overwrite any existing public/secret key pair.
+    -v               Print version information.
+```
+
 ## Library
 
 ```Go