Feature: Add web push notification permission in frontend (#766)

Add webpush notification permission in frontend

Co-authored-by: Sojan <sojan@pepalo.com>

Gemfile.lock

@@ -219,6 +219,7 @@ GEM
     haikunator (1.1.0)
     hana (1.3.5)
     hashie (4.1.0)
+    hkdf (0.3.0)
     http-accept (1.7.0)
     http-cookie (1.0.3)
       domain_name (~> 0.5)
@@ -489,6 +490,9 @@ GEM
       rack-proxy (>= 0.6.1)
       railties (>= 5.2)
       semantic_range (>= 2.3.0)
+    webpush (1.0.0)
+      hkdf (~> 0.2)
+      jwt (~> 2.0)
     websocket-driver (0.7.1)
       websocket-extensions (>= 0.1.0)
     websocket-extensions (0.1.4)
@@ -532,7 +536,7 @@ DEPENDENCIES
   letter_opener
   listen
   mini_magick
-  mock_redis
+  mock_redis!
   pg
   pry-rails
   puma
@@ -568,6 +572,7 @@ DEPENDENCIES
   valid_email2
   web-console
   webpacker
+  webpush
   wisper (= 2.0.0)
 
 RUBY VERSION