Add pwa

src/client/next.config.js

@@ -1,3 +1,20 @@
-module.exports = {
-  reactStrictMode: true,
-}
+const withPWA = require("next-pwa");
+const runtimeCaching = require("next-pwa/cache");
+
+const { PHASE_DEVELOPMENT_SERVER } = require("next/constants");
+
+module.exports = (phase, { defaultConfig }) => {
+  if (phase === PHASE_DEVELOPMENT_SERVER) {
+    return {
+      reactStrictMode: true,
+    };
+  }
+
+  return withPWA({
+    reactStrictMode: true,
+    pwa: {
+      dest: "public",
+      runtimeCaching,
+    },
+  });
+};