Add dynamic camera size request

Signed-off-by: Justin Georgi <justin.georgi@gmail.com>

src/pages/camera-mixin.js

@@ -1,6 +1,6 @@
 export default {
   methods: {
-    async openCamera() {
+    async openCamera(imContain) {
       var cameraLoaded = false
       const devicesList = await navigator.mediaDevices.enumerateDevices()
       this.videoDeviceAvailable = devicesList.some( d => d.kind == "videoinput")
@@ -9,10 +9,10 @@ export default {
         var vidConstraint = {
           video: {
             width: {
-              ideal: 1920
+              ideal: imContain.offsetWidth
             },
             height: {
-              ideal: 1080
+              ideal: imContain.offsetHeight
             },
             facingMode: 'environment'
           },