Update .env.example

.env.example

@@ -72,3 +72,11 @@ SPOOLMAN_PORT=7912
 # Default if not set: 1000
 #PUID=1000
 #PGID=1000
+
+# Allows CORS ORIGIN. 
+# Use the https://developer.mozilla.org/en-US/docs/Web/HTTP/Reference/Headers/Access-Control-Allow-Origin semantics
+# separated by commas
+# for example to allow request from source1.domain.com on port p1 and source2.domain.com on port p2
+# SPOOLMAN_CORS_ORIGIN=source1.domain.com:p1, source2.domain.com:p2
+# to allow from any
+# SPOOLMAN_CORS_ORIGIN=*