docs: describe new configuration options

Author: ludovicm67

README.md

@@ -13,3 +13,8 @@ This application can be configured using the following environment variables:
 - `PING_INTERVAL`: The interval of time in milliseconds where the ping to the MongoDB instance is done (default: `"1000"`)
 - `SLACK_TOKEN`: The Slack token used to send messages to Slack (default: `"secret-token"`)
 - `SLACK_CHANNEL`: The Slack channel where the messages will be sent (default: `"mongo-alerts"`)
+- `TIMEOUT`: Timeout to perform MongoDB commands (in milliseconds) (default: `"8000"`)
+- `CONNECT_TIMEOUT`: Timeout to connect to MongoDB (in milliseconds) (default: value of `TIMEOUT`)
+- `SOCKET_TIMEOUT`: Timeout for MongoDB socket (in milliseconds) (default: value of `TIMEOUT`)
+- `WAIT_QUEUE_TIMEOUT`: Timeout for MongoDB to get an available thread (in milliseconds) (default: value of `TIMEOUT`)
+- `MAX_IDLE_TIME`: Timeout for MongoDB to close an idle connection (in milliseconds) (default: value of `TIMEOUT`)

index.js

@@ -33,7 +33,7 @@ const waitQueueTimeoutConfig = process.env.WAIT_QUEUE_TIMEOUT || timeoutConfig;
 const waitQueueTimeout = parseInt(waitQueueTimeoutConfig, 10);
 
 // Configuration: timeout for MongoDB to close an idle connection (in milliseconds)
-const maxIdleTimeConfig = process.env.CONNECT_TIMEOUT || timeoutConfig;
+const maxIdleTimeConfig = process.env.MAX_IDLE_TIME || timeoutConfig;
 const maxIdleTime = parseInt(maxIdleTimeConfig, 10);
 
 const slackClient = new WebClient(slackToken);