Unable To Run VueJS SPA With Spring Boot

I have VueJS single page appication which I want to move to the Spring Boot project and run it in the production environment. With npm run build I genereted these files:

Hash: 0e5605ab6a3adbae5bc3
Version: webpack 3.10.0
Time: 34203ms
                                                  Asset       Size  Chunks                    Chunk Names
                  static/js/app.a8c2e3befee9add63a47.js    67.9 kB       1  [emitted]         app
                             static/img/bg3.7e9308f.jpg     191 kB          [emitted]
    static/img/glyphicons-halflings-regular.8988968.svg     109 kB          [emitted]
static/fonts/glyphicons-halflings-regular.448c34a.woff2      18 kB          [emitted]
  static/fonts/glyphicons-halflings-regular.f4769f9.eot    20.1 kB          [emitted]
  static/fonts/glyphicons-halflings-regular.e18bbf6.ttf    45.4 kB          [emitted]
                 static/fonts/element-icons.6f0a763.ttf      11 kB          [emitted]
               static/js/vendor.b870d414939280bd7c3a.js     1.1 MB       0  [emitted]  [big]  vendor
 static/fonts/glyphicons-halflings-regular.fa27723.woff    23.4 kB          [emitted]
             static/js/manifest.58a976c7eeb4e639b033.js    1.49 kB       2  [emitted]         manifest
    static/css/app.8dfb1913ee552ff55ff81ea142c3f782.css     443 kB       1  [emitted]  [big]  app
static/css/app.8dfb1913ee552ff55ff81ea142c3f782.css.map     623 kB          [emitted]
           static/js/vendor.b870d414939280bd7c3a.js.map    3.99 MB       0  [emitted]         vendor
              static/js/app.a8c2e3befee9add63a47.js.map     267 kB       1  [emitted]         app
         static/js/manifest.58a976c7eeb4e639b033.js.map     7.8 kB       2  [emitted]         manifest
                                             index.html  704 bytes          [emitted]

  Build complete.

And I copied them to /resources/static folder. When I run Spring Boot project I'm able to open index.html file, but all of the related resources like js, css and img files returns 404 Not Found Exception. I can't even load them with direct link in the browser.

This is very strange, because when I copy and paste, for example, static/css/app.8dfb1913ee552ff55ff81ea142c3f782.css file and change only one digit in the name, I'm able to load it with the browser.

How is that possible?

Looks like the coping files to the resource folder is very fragile in Spring Boot. With those exactly steps I was able to run my project:

1. Stop application (the embeded Tomcat)
2. Delete all files in /resources/static folder
3. Copy new html/css/js/img files
4. Clean and Build the project
5. Run the application