Log zigbee2mqtt version information to bridge/config (#1267)

* add coordinator_firmware to bridge/config

* Add zigbee2mqtt version and commit

* Whoops

lib/util/utils.js

@@ -67,6 +67,28 @@ function getEndpointByEntityID(zigbee, entityID, epName) {
     return endpoint;
 }
 
+function getZigbee2mqttVersion(callback) {
+    const git = require('git-last-commit');
+    const packageJSON = require('../../package.json');
+    const version = packageJSON.version;
+
+    git.getLastCommit((err, commit) => {
+        let commitHash = null;
+
+        if (err) {
+            try {
+                commitHash = require('../.hash.json').hash;
+            } catch (error) {
+                commitHash = 'unknown';
+            }
+        } else {
+            commitHash = commit.shortHash;
+        }
+
+        callback({commitHash, version});
+    });
+}
+
 module.exports = {
     millisecondsToSeconds: (milliseconds) => milliseconds / 1000,
     secondsToMilliseconds: (seconds) => seconds * 1000,
@@ -76,4 +98,5 @@ module.exports = {
     toLocalISOString: (dDate) => toLocalISOString(dDate),
     getPostfixes: () => postfixes,
     getEndpointByEntityID,
+    getZigbee2mqttVersion,
 };