refactor: Update Snort logging configuration and add ICMP rule

This commit updates the Snort logging configuration in the install-snort3.sh script. The LOG_DIR variable is modified to remove the trailing slash. Additionally, an ICMP rule is added to the Snort configuration. The rule is configured to log ICMP traffic. This change improves the logging functionality of Snort.

install-snort3.sh

@@ -157,7 +157,7 @@ fi
 # Configure Snort logging
 print_step "Configuring" "Snort logging..."
 SNORT_CONFIG="/usr/local/etc/snort/snort.lua" 
-LOG_DIR="/var/log/snort/"
+LOG_DIR="/var/log/snort"
 
 # Define the content to add
 CONFIG_CONTENT='
@@ -211,7 +211,7 @@ After=network.target
 
 [Service]
 Type=simple
-ExecStart=$SNORT_BIN -c $SNORT_CONFIG -i $MAIN_INTERFACE -l $LOG_DIR 
+ExecStart=$SNORT_BIN -c $SNORT_CONFIG -i $MAIN_INTERFACE -l $LOG_DIR -R /usr/local/etc/snort/local.rules
 User=snort
 Group=snort
 Restart=on-failure