Added phpDocumentor config.

.gitignore

@@ -4,7 +4,7 @@
 .vscode/
 .vs/
 .idea/
-docs/html/
+docs/
 .phpdoc*
 .phpunit*
 vendor/

phpdoc.xml

@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<phpdocumentor configVersion="3" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="https://www.phpdoc.org" xsi:noNamespaceSchemaLocation="data/xsd/phpdoc.xsd">
+    <title>Railgun JWT</title>
+    <template name="default" />
+    <paths>
+        <output>docs</output>
+    </paths>
+    <version number="latest">
+        <folder>latest</folder>
+        <api format="php">
+            <default-package-name>Railgun\Jwt</default-package-name>
+            <visibility>public</visibility>
+            <source dsn=".">
+                <path>src</path>
+            </source>
+            <extensions>
+                <extension>php</extension>
+            </extensions>
+            <ignore hidden="true" symlinks="true">
+                <path>tests/**/*</path>
+            </ignore>
+        </api>
+    </version>
+</phpdocumentor>