jwt: add page (#3350)

pages/common/jwt.md

@@ -0,0 +1,21 @@
+# jwt
+
+> A command line tool to work with JSON Web Tokens (JWTs).
+> Encryption algorithms available are HS256,HS384, HS512, RS256, RS384, RS512, ES256, ES384.
+> For more information: <https://github.com/mike-engel/jwt-cli>.
+
+- Decode a JWT:
+
+`jwt decode {{jwt_string}}`
+
+- Decode a JWT as a JSON string:
+
+`jwt decode -j {{jwt_string}}`
+
+- Encode a JSON string to a JWT:
+
+`jwt encode --alg {{HS256}} --secret {{1234567890}} '{{json_string}}'`
+
+- Encode key pair payload to JWT:
+
+`jwt encode --alg {{HS256}} --secret {{1234567890}} -P key=value`