chore: some clenaups

conf/node-default.properties

@@ -37,7 +37,7 @@
 ## This is "on" by default but can cost some time while starting/shutting down.
 # DB.Optimize = off
 
-## If you want to use Sqlite:
+## If you want to use Sqlite (recommended for local/non-public nodes):
 # DB.Url=jdbc:sqlite:file:./db/signum.sqlite.db
 
 ## Sqlite Journaling Mode
@@ -48,12 +48,12 @@
 ## Info: MEMORY journal mode is not supported
 # DB.SqliteJournalMode = WAL
 
-## If you want to use MariaDB:
+## If you want to use MariaDB (recommended for public nodes):
 # DB.Url=jdbc:mariadb://localhost:3306/signum
 # DB.Username=signumnode
 # DB.Password=s1gn00m_n0d3
 
-## If you want to use Postgres (Experimental):
+## If you want to use Postgres (Experimental - considered alternative for MariaDB):
 # DB.Url=jdbc:postgresql://localhost:5432/signum?sslMode=disabled
 # DB.Username=signumnode
 # DB.Password=s1gn00m_n0d3