Update generate-p12.sh

1. Added Option to parse in the npm value (I.E. npm-10)  as a required variable which is the npm value that the certificate files are stored in (I.E. '/etc/letsencrypt/live/npm-10/'   and   '/etc/letsencrypt/archive/npm-10/' )
2. Added the option to parse a password into the script to be used as the p12 password for securing the private key within the generated PKCS12 file.
3. Added Variable in script to allow the user to keep the root certificate that the script generates ($KEEP_ROOT_CERTIFICATE which it is set to true by default).
4. Added Simlinks for the .p12 file (follows the current convention)
5. Added Simlink for the root certificate, if the user chooses to keep the root certificate by setting the variable $KEEP_ROOT_CERTIFICATE to true (follows the current convention)
6. Added automatic cleanup for temporary files as well as the root file when the variable $KEEP_ROOT_CERTIFICATE is set to false.
7. Changed Print Help Text to use echo command.

Author: Whatchawnt

backend/scripts/generate-p12.sh

@@ -5,18 +5,17 @@
 SCRIPT_NAME="$(basename "$0")"
 
 print_help() {
-  cat <<EOF
-Usage: $SCRIPT_NAME --npm <name> [--password <password>]
+echo -e "\nUsage: $SCRIPT_NAME --npm <name> [--password <password>]
 
 Options:
-  --npm <name>         Required. Name or identifier used for the certificate. Must be in the form "npm-#" 
+  --npm <name>         Required. Name or identifier used for the certificate. Must be in the form 'npm-#'
   --password <string>  Optional. Password to secure the PKCS#12 (.p12) file. If not provided the scipt will use the script default.
   -h, --help           Show this help message and exit.
 
 Example:
   ./$SCRIPT_NAME --npm npm-123
   ./$SCRIPT_NAME --npm npm-123 --password secret123
-EOF
+"
 }
 
 # Initialize Required Input variables
@@ -25,7 +24,7 @@ PKCS12_PASSWORD=""
 
 # Exit early and show help if no arguments were provided
 if [[ $# -eq 0 ]]; then
-  echo -e "\nERROR - No arguments provided.\n"
+  echo -e "\n\nERROR - No arguments provided."
   print_help
   exit 1
 fi