multiple corrections on docker-compose and Dockerfile

robust start sequence
avoid scrolling of main content

dashboard/vite.config.ts

@@ -5,9 +5,16 @@ import react from '@vitejs/plugin-react';
 export default defineConfig({
   plugins: [react()],
   server: {
+    host: '0.0.0.0',
+    watch: {
+      usePolling: true,
+    },
+    fs: {
+      strict: false,
+    },
     proxy: {
-      '/api': 'http://localhost:8000',
-      '/screenshots': 'http://localhost:8000',
+      '/api': 'http://server:8000',
+      '/screenshots': 'http://server:8000',
     },
   },
 });