add possibility to deploy under the URI prefix

Dockerfile

@@ -45,6 +45,7 @@ RUN --mount=type=bind,target=./package.json,src=./superset-frontend/package.json
 
 COPY ./superset-frontend ./
 # This seems to be the most expensive step
+ARG ASSET_BASE_URL=""
 RUN npm run ${BUILD_CMD}
 
 ######################################################################

superset-frontend/src/assets/staticPages/404.html

@@ -97,7 +97,7 @@ <h1>Page not found</h1>
           Sorry, we cannot find the page you are looking for. You may have
           mistyped the address or the page may have moved.
         </p>
-        <a href="/" class="button">Back to home</a>
+        <a href="<%= prefix %>/" class="button">Back to home</a>
       </section>
       <img
         alt="404"

superset-frontend/src/assets/staticPages/500.html

@@ -96,7 +96,7 @@ <h1>Internal server error</h1>
           Sorry, something went wrong. We are fixing the mistake now. Try again
           later or go back to home.
         </p>
-        <a href="/" class="button">Back to home</a>
+        <a href="<%= prefix %>/" class="button">Back to home</a>
       </section>
       <img
         alt="500"

superset-frontend/src/utils/export.ts

@@ -19,6 +19,7 @@
 import parseCookie from 'src/utils/parseCookie';
 import rison from 'rison';
 import shortid from 'shortid';
+import { withPrefix } from './routeUtils';
 
 export default function handleResourceExport(
   resource: string,
@@ -27,9 +28,9 @@ export default function handleResourceExport(
   interval = 200,
 ): void {
   const token = shortid.generate();
-  const url = `/api/v1/${resource}/export/?q=${rison.encode(
-    ids,
-  )}&token=${token}`;
+  const url = withPrefix(
+    `/api/v1/${resource}/export/?q=${rison.encode(ids)}&token=${token}`,
+  );
 
   // create new iframe for export
   const iframe = document.createElement('iframe');

superset-frontend/webpack.config.js

@@ -131,12 +131,18 @@ const plugins = [
   // static pages
   new HtmlWebpackPlugin({
     template: './src/assets/staticPages/404.html',
+    templateParameters: {
+      prefix: ASSET_BASE_URL,
+    },
     inject: true,
     chunks: [],
     filename: '404.html',
   }),
   new HtmlWebpackPlugin({
     template: './src/assets/staticPages/500.html',
+    templateParameters: {
+      prefix: ASSET_BASE_URL,
+    },
     inject: true,
     chunks: [],
     filename: '500.html',