Add the option to set custom headers in the SW

docs/configuration.md

@@ -31,6 +31,10 @@ connectivityCheck: true # whether you want to display a message when the apps ar
 # Optional: Proxy / hosting option
 proxy:
   useCredentials: false # send cookies & authorization headers when fetching service specific data. Set to `true` if you use an authentication proxy. Can be overrided on service level. 
+  headers: # send custom headers when fetching service specific data. Can also be set on a service level.
+    Test: "Example"
+    Test1: "Example1"
+
 
 # Set the default layout and color scheme
 defaults:

src/mixins/service.js

@@ -19,12 +19,21 @@ export default {
         options.credentials = "include";
       }
 
+      if (this.proxy?.headers) {
+        options.headers = this.proxy.headers;
+      }
+
       // Each item can override the credential settings
       if (this.item.useCredentials !== undefined) {
         options.credentials =
           this.item.useCredentials === true ? "include" : "omit";
       }
 
+      // Each item can have their own headers
+      if (this.item.headers !== undefined) {
+        options.headers = this.item.headers;
+      }
+
       options = Object.assign(options, init);
 
       if (path.startsWith("/")) {