add severity level as string for pino

backend/src/utils/logging/logger.ts

@@ -3,6 +3,16 @@ import { getAwsCloudWatchLog, getNodeEnv } from "../../config";
 
 export let logger: Logger;
 
+// https://github.com/pinojs/pino/blob/master/lib/levels.js#L13-L20
+const logLevelToSeverityLookup: Record<string, string> = {
+  '10': 'TRACE',
+  '20': 'DEBUG',
+  '30': 'INFO',
+  '40': 'WARNING',
+  '50': 'ERROR',
+  '60': 'CRITICAL'
+}
+
 export const initLogger = async () => {
   const awsCloudWatchLogCfg = await getAwsCloudWatchLog();
   const nodeEnv = await getNodeEnv();
@@ -40,6 +50,9 @@ export const initLogger = async () => {
 
   logger = pino(
     {
+      mixin(_context, level) {
+        return { 'severity': logLevelToSeverityLookup[level] || logLevelToSeverityLookup['30'] }
+      },
       level: process.env.PINO_LOG_LEVEL || "info",
       formatters: {
         bindings: (bindings) => {