espid2sensor in Hauptstack aufnehmen, verschachteltes Git-Repo aufgeloest

espid2sensor lief bisher nur per eigenem Dev-Compose mit isolierter
Wegwerf-Mongo. Jetzt Teil von noisesensors/docker-compose.yml, Port 3004,
Zugriff auf die dort laufende mongodb-Instanz (sensor_data). DEV_AUTO_LOGIN
explizit aus, SESSION_SECRET ueber neue Env-Variable statt Code-Default.

Dockerfile_esp2sensor an das Muster der anderen Services angeglichen
(node:22-alpine, /opt/app, npm ci, tzdata/Europe-Berlin, deluser node).

espid2sensor/.git entfernt (war eigenes verschachteltes Repo) und der
komplette Verzeichnisinhalt ins laermsensor-stack-Repo uebernommen.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

espid2sensor/db/mongo.js

@@ -0,0 +1,59 @@
+import { MongoClient } from 'mongodb';
+import dotenv from 'dotenv';
+
+dotenv.config();
+
+const MONGOHOST = process.env.MONGOHOST || 'localhost'
+const MONGOPORT = process.env.MONGOPORT || 27017
+const MONGOAUTH = process.env.MONGOAUTH ||  false
+const MONGOUSRP = process.env.MONGOUSRP || ''
+const MONGOBASE =  process.env.MONGOBASE || 'sensor_data'
+let MONGO_URL = 'mongodb://'+MONGOHOST+':'+MONGOPORT;  	// URL to mongo database
+if (MONGOAUTH === 'true') {
+    MONGO_URL = 'mongodb://'+MONGOUSRP+'@' + MONGOHOST + ':' + MONGOPORT  + '/?authSource=admin';          // URL to mongo database
+}
+const DB_NAME = MONGOBASE
+
+let db, usersCollection, propCollection;
+let client = null;
+
+export async function initMongo() {
+  const client = new MongoClient(MONGO_URL);
+  await client.connect();
+  db = client.db(DB_NAME);
+  usersCollection = db.collection('user');
+  propCollection = db.collection('properties')
+  return { db, usersCollection, propCollection};
+}
+
+export const clientClose = async () => {
+  if (client) {
+    client.close()
+  }
+}
+
+
+export function getCollections() {
+  return { db, usersCollection, propCollection};
+}
+
+export const update_pflux = async(sn, doc) => {
+  try {
+    await propCollection.updateOne({_id: sn},{ $set: { 'chip': doc}})
+    return {"error": null}
+  } catch (e) {
+    return { "error": true, "what": e}
+  }
+}
+
+export const get_pflux = async(sn) => {
+  try {
+    let r = await propCollection.findOne({_id: sn})
+    if (r == null) {
+      return { "error": true, "what": "Not found", "erg": r}
+    }
+    return {"error": null, "what": null, "erg": r}
+  } catch (e) {
+    return { "error": true, "what": e, "erg": null}
+  }
+}