improve instana monitoring

.env

@@ -0,0 +1 @@
+INSTANA_MONITORING=false

README.md

@@ -84,10 +84,7 @@ See [Contributing](https://github.com/orangecoding/fredy/blob/master/CONTRIBUTIN
 ### Monitoring
 
 _Fredy_ can be monitored by [Instana](https://www.instana.com). If you are interested, sign up for a free trial. This is totally optional of course :)  
-If you want to use Instana to monitor _Fredy_, you have to set an environment variable to true before starting _Fredy_.
-```
-SET INSTANA_MONITORING=true
-```
+If you want to use Instana to monitor _Fredy_, please change the variable `INSTANA_MONITORING` in the `.env` file to `true`.
 
 # Docker   
 Use the Dockerfile in this repository to build an image.  

index.js

@@ -1,3 +1,4 @@
+require('dotenv').config();
 /********OPTIONAL INSTANA INITIALIZATION BEGIN********/
 //if you want to use Instana to monitor fredy, go to https://www.instana.com and
 // try it yourself by signing up for a free trial

package.json

@@ -61,6 +61,7 @@
     "axios-retry": "^3.2.4",
     "body-parser": "1.19.0",
     "cookie-session": "1.4.0",
+    "dotenv": "^15.0.0",
     "handlebars": "4.7.7",
     "highcharts": "9.3.1",
     "highcharts-react-official": "3.1.0",

yarn.lock

@@ -3119,6 +3119,11 @@ domutils@^1.5.1:
     dom-serializer "0"
     domelementtype "1"
 
+dotenv@^15.0.0:
+  version "15.0.0"
+  resolved "https://registry.yarnpkg.com/dotenv/-/dotenv-15.0.0.tgz#2a585639429bf2c2c62f387f0fffde9c75aafde0"
+  integrity sha512-/l1sXXm79ry34KwwS0y4oVZjB468iw/6u9g1W26dtexKcIJAnVL2pMF+hxQwzZ7LutxOwEgtym9eIxvX33CMKg==
+
 dtrace-provider@~0.8:
   version "0.8.8"
   resolved "https://registry.yarnpkg.com/dtrace-provider/-/dtrace-provider-0.8.8.tgz#2996d5490c37e1347be263b423ed7b297fb0d97e"