no idea- added loki and other stuff to market-data-gateway, also added config lib

libs/config/src/logging.ts

@@ -0,0 +1,75 @@
+/**
+ * Loki logging configuration for Stock Bot platform
+ */
+import { z } from 'zod';
+import { getEnvVar, getNumericEnvVar, getBooleanEnvVar } from './core';
+
+/**
+ * Loki configuration schema
+ */
+export const lokiConfigSchema = z.object({
+  host: z.string().default('localhost'),
+  port: z.number().default(3100),
+  username: z.string().optional(),
+  password: z.string().optional(),
+  retentionDays: z.number().default(30),
+  labels: z.record(z.string()).default({}),
+  batchSize: z.number().default(100),
+  flushIntervalMs: z.number().default(5000)
+});
+
+export type LokiConfig = z.infer<typeof lokiConfigSchema>;
+
+/**
+ * Logging configuration schema
+ */
+export const loggingConfigSchema = z.object({
+  level: z.enum(['debug', 'info', 'warn', 'error']).default('info'),
+  console: z.boolean().default(true),
+  loki: lokiConfigSchema
+});
+
+export type LoggingConfig = z.infer<typeof loggingConfigSchema>;
+
+/**
+ * Parse labels from environment variable string
+ * Format: key1=value1,key2=value2
+ */
+function parseLabels(labelsStr?: string): Record<string, string> {
+  if (!labelsStr) return {};
+  
+  const labels: Record<string, string> = {};
+  labelsStr.split(',').forEach(labelPair => {
+    const [key, value] = labelPair.trim().split('=');
+    if (key && value) {
+      labels[key] = value;
+    }
+  });
+  
+  return labels;
+}
+
+/**
+ * Load logging configuration from environment variables
+ */
+export function loadLoggingConfig(): LoggingConfig {
+  return {
+    level: (getEnvVar('LOG_LEVEL') || 'info') as 'debug' | 'info' | 'warn' | 'error',
+    console: getBooleanEnvVar('LOG_CONSOLE', true),
+    loki: {
+      host: getEnvVar('LOKI_HOST') || 'localhost',
+      port: getNumericEnvVar('LOKI_PORT', 3100),
+      username: getEnvVar('LOKI_USERNAME'),
+      password: getEnvVar('LOKI_PASSWORD'),
+      retentionDays: getNumericEnvVar('LOKI_RETENTION_DAYS', 30),
+      labels: parseLabels(getEnvVar('LOKI_LABELS')),
+      batchSize: getNumericEnvVar('LOKI_BATCH_SIZE', 100),
+      flushIntervalMs: getNumericEnvVar('LOKI_FLUSH_INTERVAL_MS', 5000)
+    }
+  };
+}
+
+/**
+ * Singleton logging configuration
+ */
+export const loggingConfig = loadLoggingConfig();