Work on #445 - PWA manifest for Firefox

angular.json

@@ -22,6 +22,7 @@
               "src/locale",
               "src/favicon.ico",
               "src/.htaccess",
+              "src/cassiopee.webmanifest",
               {
                 "glob": "**/*.json",
                 "input": "src/",
@@ -112,6 +113,7 @@
             "assets": [
               "src/assets",
               "src/favicon.ico",
+              "src/cassiopee.webmanifest",
               "src/**/*.json",
               "src/**/*.md",
               "src/**/*.png"

src/cassiopee.webmanifest

+{
+    "name": "Cassiopée",
+    "short_name": "cassiopee",
+    "description": "Hydraulic calculators",
+    "icons": [
+        {
+            "src": "assets/icons/favicon-16x16.png",
+            "sizes": "16x16",
+            "type": "image/png"
+        },
+        {
+            "src": "assets/icons/favicon-32x32.png",
+            "sizes": "32x32",
+            "type": "image/png"
+        },
+        {
+            "src": "assets/icons/android-chrome-192x192.png",
+            "sizes": "192x192",
+            "type": "image/png"
+        },
+        {
+            "src": "assets/icons/android-chrome-512x512.png",
+            "sizes": "512x512",
+            "type": "image/png"
+        }
+    ],
+    "start_url": "index.html",
+    "display": "fullscreen",
+    "theme_color": "#003A80",
+    "background_color": "#003A80"
+}

src/index.html

@@ -12,6 +12,7 @@
    <link rel="icon" type="image/png" sizes="32x32" href="/favicon-32x32.png">
    <link rel="icon" type="image/png" sizes="16x16" href="/favicon-16x16.png">
    <link rel="mask-icon" href="/safari-pinned-tab.svg" color="#ffffff">
+   <link rel="manifest" href="/cassiopee.webmanifest">
 
    <meta name="viewport" content="width=device-width, initial-scale=1">
 </head>