configure datapath with env variable

index.js

@@ -1,4 +1,10 @@
+const fs = require('fs');
 const Controller = require('./lib/controller');
+const data = require('./lib/util/data');
+
+if (process.env.ZIGBEE2MQTT_DATA) {
+  fs.copyFileSync('./data/configuration.yaml', data.joinPath('configuration.yaml'))
+}
 
 const controller = new Controller();
 controller.start();
@@ -7,4 +13,4 @@ process.on('SIGINT', handleQuit);
 
 function handleQuit() {
     controller.stop(() => process.exit());
-}
+}

lib/util/data.js

@@ -0,0 +1,14 @@
+const path = require('path');
+
+function dataPath() {
+  if (process.env.ZIGBEE2MQTT_DATA) {
+    return process.env.ZIGBEE2MQTT_DATA;
+  } else {
+    return `${__dirname}/../../data`;
+  }
+}
+
+module.exports = {
+  path: dataPath(),
+  joinPath: (file) => path.join(dataPath(), file)
+}

lib/util/logger.js

@@ -1,9 +1,10 @@
 const winston = require('winston');
+const data = require('./data');
 
 const logger = new (winston.Logger)({
     transports: [
         new (winston.transports.File)({
-            filename: 'data/log.txt',
+            filename: data.joinPath('log.txt'),
             json: false,
             level: winston.level.info,
             maxFiles: 3,

lib/util/settings.js

@@ -1,6 +1,7 @@
 const YAWN = require('yawn-yaml/cjs');
 const fs = require('fs');
-const file = `${__dirname}/../../data/configuration.yaml`;
+const data = require('./data');
+let file = data.joinPath('configuration.yaml');
 let yawn = read();
 
 function write() {

lib/zigbee.js

@@ -2,10 +2,11 @@ const ZShepherd = require('zigbee-shepherd');
 const logger = require('./util/logger');
 const settings = require('./util/settings');
 const deviceMapping = require('./devices');
+const data = require('./util/data');
 
 const shepherdSettings = {
     net: {panId: 0x1a62},
-    dbPath: `${__dirname}/../data/database.db`
+    dbPath: data.joinPath('database.db')
 };
 
 class Zigbee {