add new config to .env.example

.env.example

@@ -29,4 +29,13 @@ ENABLED_TOKENS=FUSD:0xf8d6e0586b0a20c7:fusd,FlowToken:0x0ae53cb6e3f42a79:flowTok
 # This sets the number of proposal keys to be used on the admin account.
 # You can increase transaction throughput by using multiple proposal keys for
 # parallel transaction execution.
-ADMIN_PROPOSAL_KEY_COUNT=50
+ADMIN_PROPOSAL_KEY_COUNT=50
+
+# Defines the maximum number of active jobs that can be queued before 
+# new jobs are rejected.
+# WORKER_QUEUE_CAPACITY=1000 (default)
+
+# Number of concurrent workers handling incoming jobs.
+# You can increase the number of workers if you're sending 
+# too many transactions and find that the queue is often backlogged.
+# WORKER_COUNT=100 (default)