Fix import path in three places.

Switch Dockerfile to use absolute paths

src/config.ts

@@ -1,6 +1,6 @@
 import { readFileSync, existsSync } from "node:fs"
 import { join } from "node:path"
-import { log } from "./logger";
+import { log } from "./logger.js";
 
 interface Config {
     Mq: Mq,

src/nats.ts

@@ -1,9 +1,9 @@
 import { connect, JSONCodec } from "nats";
 import type { ConnectionOptions, NatsConnection, Payload } from "nats";
-import { log } from "./logger";
+import { log } from "./logger.js";
 import { hostname } from "node:os";
 import type { MQFileUpdate } from "@owlboard/backend-data-contracts/dist/data-ingress_mq-file-update";
-import type { Mq } from "./config";
+import type { Mq } from "./config.js";
 
 const jc = JSONCodec();