feat(observability): Replace Prometheus package with OpenTelemetry

src/logger/logger.ts

@@ -0,0 +1,32 @@
+import { context, trace } from "@opentelemetry/api";
+import Pino, { Logger, LoggerOptions } from "pino";
+
+export const loggerOptions: LoggerOptions = {
+  level: "debug",
+  formatters: {
+    level(label) {
+      return { level: label };
+    },
+    log(object) {
+      const span = trace.getSpan(context.active());
+      if (!span) return { ...object };
+      const { spanId, traceId } = trace
+        .getSpan(context.active())
+        ?.spanContext();
+      return { ...object, spanId, traceId };
+    },
+  },
+  transport:
+    process.env.NODE_ENV === "local"
+      ? {
+          target: "pino-pretty",
+          options: {
+            colorize: true,
+            levelFirst: true,
+            translateTime: true,
+          },
+        }
+      : null,
+};
+
+export const logger: Logger = Pino(loggerOptions);