diff --git a/DOCS.md b/DOCS.md
index f4c8bba..333ddf7 100644
--- a/DOCS.md
+++ b/DOCS.md
@@ -37,7 +37,7 @@ steps:
 +     text: "Hello Repo {{ .RepositoryName }}!"
 ```
 
-Sample of sending a message with attachment file:
+Sample of sending a message with local attachment file:
 
 ```diff
 steps:
@@ -47,6 +47,22 @@ steps:
     parameters:
 -     text: "Hello World!"
       filepath: slack_attachment.json
+      remote: false
+      registry: https://github.com
+```
+
+Sample of sending a message with remote attachment file:
+
+```diff
+steps:
+  - name: message-with-remote-attachment
+    image: target/vela-slack:latest
+    secrets: [ webhook ]
+    parameters:
+-     text: "Hello World!"
+      filepath: slack_attachment.json
+      remote: true
+      registry: https://github.com
 ```
 
 content of `slack_attachment.json`:
diff --git a/cmd/vela-slack/plugin.go b/cmd/vela-slack/plugin.go
index 3e41ff4..92ce6a6 100644
--- a/cmd/vela-slack/plugin.go
+++ b/cmd/vela-slack/plugin.go
@@ -204,11 +204,9 @@ func (p *Plugin) Validate() error {
 	return nil
 }
 
-// getRemoteAttachment function to open and parse slack attachment json file into
-// slack webhook message payload.
+// getRemoteAttachment function converts bytes into string and replaces variables
+// such as {{ .BuildCreated }} with a correct values before returning it back into bytes again.
 func replaceString(bytes []byte, p *Plugin) []byte {
-	// Converts bytes into string and replaces {{ .BuildCreated }}
-	// with a timestamp before returning it back into bytes again.
 	bStr := string(bytes)
 	bStr = strings.ReplaceAll(bStr, "{{ .BuildCreated }}", strconv.Itoa(p.Env.BuildCreated))
 	bStr = strings.ReplaceAll(bStr, "{{ .BuildEnqueued }}", strconv.Itoa(p.Env.BuildEnqueued))