chore: update .env.example for NIP-32 compatibility

.env.example

@@ -1,6 +1,12 @@
 NODE_ENV=production
 
 # ENV variable for nostr-monitoring-tool. Check atrifat/nostr-monitoring-tool github for more information.
+
+# (Optional. Default: true) Set whether to publish NIP-32 classification event (kind: 1985)
+ENABLE_NIP_32_CLASSIFICATION_EVENT=true
+# (Optional. Default: true) (Deprecated) Set whether to publish legacy classification event (kind: 9978)
+ENABLE_LEGACY_CLASSIFICATION_EVENT=true
+
 ENABLE_NSFW_CLASSIFICATION=true
 NSFW_DETECTOR_ENDPOINT=http://localhost:8082/predict
 NSFW_DETECTOR_TOKEN=
@@ -53,6 +59,24 @@ LISTEN_PORT=7860
 # (Optional) Set true to enable forwarding of request headers to upstream server, useful if relays behind reverse proxy
 ENABLE_FORWARD_REQ_HEADERS=false
 
+# (Default: true) Use NIP-32 Event Format (kind: 1985) or Deprecated Legacy Format (kind: 9978). Legacy format will be fully replaced by NIP-32 event format in the future.
+USE_NIP_32_EVENT_FORMAT=true
+
+# Set maximum websocket server payload size (maximum allowed message size) in bytes
+MAX_WEBSOCKET_PAYLOAD_SIZE=1000000
+
+# Set maximum number of parallel concurrency limit when requesting classification events to relay
+RELAY_REQUEST_CONCURRENCY_LIMIT=10
+
+# Set true to enable rate limit for number of websocket message
+ENABLE_RATE_LIMIT=false
+# Set to "IP" to rate limit based on IP addresses otherwise using socketId
+RATE_LIMIT_KEY="IP"
+# Maximum number of websocket message (REQ, EVENT, etc) per second per IP/socketId
+MAX_WEBSOCKET_MESSAGE_PER_SECOND=10
+# Maximum number of websocket message (REQ, EVENT, etc) per minute per IP/socketId
+MAX_WEBSOCKET_MESSAGE_PER_MINUTE=1000
+
 # (Optional. Default: sfw. Options: all, sfw, partialsfw, and nsfw) Filter hate speech (toxic comment).
 DEFAULT_FILTER_CONTENT_MODE=sfw
 # (Optional. Default: 75, Options: 0-100) Default minimum probability/confidence score to determine the classification of nsfw content