Add config.json, nothing is sensitive in it, use .env

.gitignore

@@ -9,7 +9,6 @@ lerna-debug.log*
 .VSCodeCounter
 .vscode
 .vscode/*
-config.json
 log.txt
 nohup.out
 data/config.db

src/assets/config.json

@@ -0,0 +1,21 @@
+{
+    "config": {
+        "mqtt": {
+            "address": "wd://broker-url:port",
+            "subscriptions": [
+                {
+                    "name": "igniter",
+                    "topic": "hestia/status/igniter"
+                },
+                {
+                    "name": "exhaust",
+                    "topic": "hestia/status/exhaust"
+                },
+                {
+                    "name": "auger",
+                    "topic": "hestia/status/auger"
+                }
+            ]
+        }
+    }
+}