finally it seems to work

server/.dockerignore

@@ -0,0 +1,2 @@
+build
+.gradle

server/build.gradle

@@ -44,3 +44,11 @@ dependencies {
 tasks.named('test') {
     useJUnitPlatform()
 }
+
+jar {
+    manifest {
+        attributes(
+                'Main-Class': 'com.usatiuk.tjv.y.server.ServerApplication'
+        )
+    }
+}

server/src/main/java/com/usatiuk/tjv/y/server/WebConfig.java

@@ -2,9 +2,13 @@ package com.usatiuk.tjv.y.server;
 
 import jakarta.servlet.http.HttpServletRequest;
 import org.springframework.context.annotation.Configuration;
-import org.springframework.core.io.ClassPathResource;
+import org.springframework.core.io.FileSystemResource;
 import org.springframework.core.io.Resource;
 import org.springframework.http.CacheControl;
+import org.springframework.http.MediaType;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
 import org.springframework.web.servlet.config.annotation.EnableWebMvc;
 import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
 import org.springframework.web.servlet.config.annotation.ViewControllerRegistry;
@@ -12,6 +16,9 @@ import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
 import org.springframework.web.servlet.resource.ResourceResolver;
 import org.springframework.web.servlet.resource.ResourceResolverChain;
 
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
 import java.time.Duration;
 import java.util.List;
 
@@ -21,9 +28,9 @@ public class WebConfig implements WebMvcConfigurer {
     static class AppResourceResolver implements ResourceResolver {
         @Override
         public Resource resolveResource(HttpServletRequest request, String requestPath, List<? extends Resource> locations, ResourceResolverChain chain) {
-            ClassPathResource res = new ClassPathResource("/app/" + requestPath);
+            FileSystemResource res = new FileSystemResource("/usr/src/app/client/dist/" + requestPath);
             if (res.exists()) return res;
-            ClassPathResource indexRes = new ClassPathResource("/app/index.html");
+            FileSystemResource indexRes = new FileSystemResource("/usr/src/app/client/dist/index.html");
             if (indexRes.exists()) return indexRes;
             return null;
         }
@@ -34,9 +41,24 @@ public class WebConfig implements WebMvcConfigurer {
         }
     }
 
+
+    @RestController
+    @RequestMapping(value = "/app", produces = MediaType.TEXT_HTML_VALUE)
+    static class AppRootContoller {
+        @GetMapping
+        public String get() throws IOException {
+            return Files.readString(Path.of("/usr/src/app/client/dist/index.html"));
+        }
+
+        @GetMapping("/")
+        public String getSlash() throws IOException {
+            return Files.readString(Path.of("/usr/src/app/client/dist/index.html"));
+        }
+    }
+
     @Override
     public void addViewControllers(ViewControllerRegistry registry) {
-        registry.addRedirectViewController("/app/", "/app/index.html");
+        registry.addRedirectViewController("/", "/app");
     }
 
     @Override

server/src/main/java/com/usatiuk/tjv/y/server/security/WebSecurityConfig.java

@@ -63,6 +63,7 @@ public class WebSecurityConfig {
                         .requestMatchers(mvc.pattern("/swagger-ui*/**")).permitAll()
                         .requestMatchers(mvc.pattern("/v3/**")).permitAll()
                         .requestMatchers(mvc.pattern("/error")).permitAll()
+                        .requestMatchers(mvc.pattern("/")).permitAll()
                         .anyRequest().hasAuthority(UserRoles.ROLE_USER.name()))
                 .sessionManagement((session) -> session.sessionCreationPolicy(SessionCreationPolicy.STATELESS))
                 .addFilterBefore(jwtRequestFilter, UsernamePasswordAuthenticationFilter.class)