Add return type to functions

content/en/functions/encoding/Base64Encode.md

@@ -0,0 +1,22 @@
+---
+title: encoding.Base64Encode
+linkTitle: base64Encode
+description: Returns the base64 decoding of the given content.
+categories: [functions]
+keywords: []
+menu:
+  docs:
+    parent: functions
+function:
+  aliases: [base64Encode]
+  returnType: string
+  signatures: [encoding.Base64Encode INPUT]
+relatedFunctions:
+  - encoding.Base64Decode
+  - encoding.Base64Encode
+aliases: [/functions/base64, /functions/base64Encode]
+---
+
+```go-html-template
+{{ "Hugo" | base64Encode }} → "SHVnbw=="
+```