sysstat_webhook : add some context

sysstat_webhook/README.md

@@ -1,18 +1,40 @@
 # Sysstat_Webhook
 
 currently, WIP. But yeah, Discord sucks! They don't rendering SVG.
+# Required Package
 ```
 sudo apt install -y librsvg2-bin
 ```
+
+# Arguments
 ```
         w) webhook_url=${OPTARG};;    # Discord Webhook URL
         c) CPU="True";;               # CPU
         r) RAM="True";;               # RAM
         d) DISK_IO="True";;           # DISK I/O
         n) NETWORK="True";;           # Network
+        t) MESSAGE_TEXT=${OPTARG};;   # Add some text to your webhook message!
         f) datafile=${OPTARG};;       # where your data belongs!
+        o) SYSSTAT_OPTIONS=${OPTARG};; # Sysstat options  
 ```
 
+# Basic running
 ```
-curl -sL https://github.com/minoplhy/scriptbox/raw/main/sysstat_webhook/stat_discord.sh | bash -s -- -w WEBHOOK_URL ARGUMENTS GOES HERE!
+curl -sL https://github.com/minoplhy/scriptbox/raw/main/sysstat_webhook/stat_discord.sh | bash -s -- -w <WEBHOOK_URL> ARGUMENTS GOES HERE!
+```
+
+# Sample usage
+
+This will get stats from previous day , and the webhook message will be yesterday date.
+
+something like this :
+
+![Yesterday date](assets/screenshot.png)
+
+```
+text=$(date -d '-1 day' '+%Y-%m-%d')
+d1=$(date -d '-1 day' '+%d')
+file=/var/log/sysstat/sa$d1
+
+curl -sL https://github.com/minoplhy/scriptbox/raw/main/sysstat_webhook/stat_discord.sh | bash -s -- -w <WEBHOOK_URL> -c -f "$file" -t "$text
 ```