Updated Notify_signal (markdown)

Notify_signal.md

@@ -1,11 +1,29 @@
 ## Signal API
 * **Source**: https://github.com/bbernhard/signal-cli-rest-api
 * **Icon Support**: No
+* **Attachment Support**: Yes
 * **Message Format**: Text
 * **Message Limit**: 32768 Characters per message
 
 ### Account Setup
-This plugin assumes you have configured yourself up with the [Signal Rest API Service](https://github.com/bbernhard/signal-cli-rest-api)
+First of all you need a Signal account.  So it is presumed you've either got the Apple or Android version of the Signal software.
+
+From here, the plugin assumes you have configured yourself up with the [Signal Rest API Service](https://github.com/bbernhard/signal-cli-rest-api).
+
+A simple setup might be:
+```bash
+# Create a directory for our configuration to get stored into
+mkdir -p $HOME/.signal-api
+
+# Launch a Signal API instance that listens on port 9922
+docker run -d --name signal-api --restart=always -p 9922:8080 \
+	-v $HOME/.signal-api:/home/.local/share/signal-cli \
+   -e 'MODE=native' -e SIGNAL_CLI_UID=$(id -u) -e SIGNAL_CLI_GID=$(id -g) \
+   bbernhard/signal-cli-rest-api
+```
+
+If all goes well, you should be able to point your browser to: `http://localhost:9922/v1/qrcodelink?device_name=signal-api` and from your phone app, follow the instructions to add a **Linked Device**.
+
 The **{FromPhoneNo}** must be the number associated with your account.
 
 ### Syntax
@@ -45,4 +63,23 @@ apprise -vv -t "Test Message Title" -b "Test Message Body" \
 # dashes are accepted in a phone no field):
 apprise -vv -t "Test Message Title" -b "Test Message Body" \
    signal://localhost/1-(900) 555-9999/1-(800) 555-1223
-```
+```
+
+Based on my personal experiences, I was able to send a notification to myself by simply doing the following:
+```bash
+# Assuming our {Hostname} is localhost (hosting the bbernhard/signal-cli-rest-api)
+# Assuming our {Port} is 9922
+# Assuming our {FromPhoneNo} is +1 555 555 1234
+apprise -vv -t "Test Message Title" -b "Test Message Body" \
+   signal://localhost:9922/15555551234
+```
+
+I could even send an attachment without a problem:
+```bash
+apprise -vv -t -b "test" \
+   signal://localhost:9922/15555551234 --attach apprise-test.gif
+```
+
+Which produced:
+![image](https://user-images.githubusercontent.com/850374/168930313-05e2bfb2-48f3-4a0a-b0ef-e5c601c97703.png)
+