Add conf.yaml PWA config (#168)

Closes: #160
Reviewed-on: #168

src/pages/detect.vue

@@ -99,7 +99,7 @@
         <f7-button style="height: auto; width: auto;" popover-close="#capture-popover" @click="selectImage('file')">
           <SvgIcon icon="photo_library" />
         </f7-button>
-        <f7-button v-if="otherSettings.demo" style="height: auto; width: auto;" popover-close="#capture-popover" @click="selectImage('sample')">
+        <f7-button v-if="demoEnabled" style="height: auto; width: auto;" popover-close="#capture-popover" @click="selectImage('sample')">
           <SvgIcon icon="photo_sample"/>
         </f7-button>
       </f7-segmented>
@@ -120,6 +120,7 @@
   import submitMixin from './submit-mixin'
   import detectionMixin from './detection-mixin'
   import cameraMixin from './camera-mixin'
+import { Conv2DBackpropFilter } from '@tensorflow/tfjs'
 
   export default {
     mixins: [submitMixin, detectionMixin, cameraMixin],
@@ -252,6 +253,9 @@
         } else {
           return false
         }
+      },
+      demoEnabled () {
+        return this.otherSettings.demo || this.demoMode
       }
     },
     methods: {