Remove a trailing slash in the webapp paths (line#1013)

Motivation:

`/app/projects` is more concise and simple than `/app/projects/`

Modifications:

- Set `trailingSlash` to false and revert workarounds to support a
trailing slash.
- Miscellanous) Generated a Central Dogma favicon from
`central_dogma.png` and added to `public/` directory
- Bump Armeria version to 1.30.0

Result:

Paths in the webapp no longer contains a trailing slash.

server/src/main/java/com/linecorp/centraldogma/server/CentralDogma.java

@@ -894,6 +894,7 @@ protected HttpResponse doGet(ServiceRequestContext ctx, HttpRequest req) {
                                 .cacheControl(ServerCacheControl.REVALIDATED)
                                 .autoDecompress(true)
                                 .serveCompressedFiles(true)
+                                .fallbackFileExtensions("html")
                                 .build());
 
             sb.serviceUnder("/legacy-web",

server/src/main/java/com/linecorp/centraldogma/server/auth/AuthProvider.java

@@ -40,14 +40,13 @@ public interface AuthProvider {
      * A login page path for the web console. If a user, who has not logged into the web console yet,
      * opens the web console, the web browser would bring the user to the login page.
      */
-    // TODO(ikhoon): Remove the trailing slash once https://github.com/line/armeria/issues/4542 is resolved.
-    String LOGIN_PATH = "/link/auth/login/";
+    String LOGIN_PATH = "/link/auth/login";
 
     /**
      * A logout page path for the web console. If a user clicks the logout button on the navigation bar,
      * the web browser would bring the user to the logout page.
      */
-    String LOGOUT_PATH = "/link/auth/logout/";
+    String LOGOUT_PATH = "/link/auth/logout";
 
     /**
      * A base path of the built-in web app.
@@ -57,12 +56,12 @@ public interface AuthProvider {
     /**
      * A path which provides a built-in HTML login form to a user.
      */
-    String BUILTIN_WEB_LOGIN_PATH = BUILTIN_WEB_BASE_PATH + "/login/";
+    String BUILTIN_WEB_LOGIN_PATH = BUILTIN_WEB_BASE_PATH + "/login";
 
     /**
      * A path which provides a built-in HTML logout page to a user.
      */
-    String BUILTIN_WEB_LOGOUT_PATH = BUILTIN_WEB_BASE_PATH + "/logout/";
+    String BUILTIN_WEB_LOGOUT_PATH = BUILTIN_WEB_BASE_PATH + "/logout";
 
     /**
      * A set of {@link Route}s which handles a login request. It is necessary only if
@@ -85,7 +84,7 @@ public interface AuthProvider {
      * the browser would bring a user to the built-in web login page served on {@value BUILTIN_WEB_LOGIN_PATH}.
      */
     default HttpService webLoginService() {
-        // Redirect to the default page: /link/auth/login -> /web/auth/login/
+        // Redirect to the default page: /link/auth/login -> /web/auth/login
         return (ctx, req) -> {
             String returnTo = ctx.queryParam("return_to");
             if (returnTo != null) {
@@ -103,7 +102,7 @@ default HttpService webLoginService() {
      * {@value BUILTIN_WEB_LOGOUT_PATH}.
      */
     default HttpService webLogoutService() {
-        // Redirect to the default page: /link/auth/logout -> /web/auth/logout/
+        // Redirect to the default page: /link/auth/logout -> /web/auth/logout
         return (ctx, req) -> {
             String returnTo = ctx.queryParam("return_to");
             if (returnTo != null) {

webapp/next.config.js

@@ -7,7 +7,7 @@ const withBundleAnalyzer = require('@next/bundle-analyzer')({
 const isDev = process.env.NEXT_ENV === 'development';
 const nextConfig = {
   productionBrowserSourceMaps: isDev,
-  trailingSlash: true,
+  trailingSlash: false,
   output: isDev ? 'standalone' : 'export',
   distDir: 'build/web/',
   images: {

webapp/public/site.webmanifest

@@ -0,0 +1 @@
+{"name":"","short_name":"","icons":[{"src":"/android-chrome-192x192.png","sizes":"192x192","type":"image/png"},{"src":"/android-chrome-512x512.png","sizes":"512x512","type":"image/png"}],"theme_color":"#ffffff","background_color":"#ffffff","display":"standalone"}

webapp/src/dogma/features/auth/Authorized.tsx

@@ -48,7 +48,7 @@ export const Authorized = (props: { children: ReactNode }) => {
     router.push(
       process.env.NEXT_PUBLIC_HOST
         ? `${process.env.NEXT_PUBLIC_HOST}/link/auth/login/?return_to=${window.location.origin}`
-        : `/link/auth/login/`,
+        : `/link/auth/login`,
     );
   }
   return <></>;