diff --git a/README.md b/README.md
index 49d52a4..9e42371 100644
--- a/README.md
+++ b/README.md
@@ -2,11 +2,9 @@
 
 ## TODOs
 
-### Apache httpd
-- [ ] Enable logging to APACHE_LOG_DIR (this folder is currently being created during build process, but not used by apache server)
-- [X] Redirecting from /index.html to /
+### Httpd
 - [ ] https support
 
 ### Java FCGI
-- [ ] User input validation
-- [ ] Add support of responces with information about errors
+- [X] User input validation
+- [X] Add support of responces with information about errors
diff --git a/httpd/static/assets/img/logo.ico b/httpd/static/assets/img/logo.ico
new file mode 100644
index 0000000..acc119e
Binary files /dev/null and b/httpd/static/assets/img/logo.ico differ
diff --git a/httpd/static/index.html b/httpd/static/index.html
index 96dd94a..b872632 100644
--- a/httpd/static/index.html
+++ b/httpd/static/index.html
@@ -5,6 +5,7 @@
 	<meta name="viewport" content="width=device-width, initial-scale=1.0">
 	<title>Web lab1</title>
 	<script src="./js/ajax.js"></script>
+	<link rel="icon" href="assets/img/logo.ico" type="image/x-icon"/>
 	<style>
 		:root {
 			/* Цветовая палитра в OKLCH */
@@ -733,9 +734,7 @@ <h3 class="history-title">История введенных данных</h3>
 			
 			if (X && R && Y) {
 
-				// Stub
 				sendAJAXGETRequest("/fcgi/", {"x": X, "y": Y, "r": R}, (data) => {FFCGIResponceHandler(data, X,Y,R)});
-				console.log(`Данные отправлены!\nX: ${X}\nY: ${Y}\nR: ${R}`);	
 
 				// Очищаем форму
 				this.reset();
diff --git a/server/.idea/misc.xml b/server/.idea/misc.xml
index b2eea27..6111a9a 100644
--- a/server/.idea/misc.xml
+++ b/server/.idea/misc.xml
@@ -1,7 +1,14 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="ExternalStorageConfigurationManager" enabled="true" />
-  <component name="ProjectRootManager" version="2" default="true">
+  <component name="MavenProjectsManager">
+    <option name="originalFiles">
+      <list>
+        <option value="$PROJECT_DIR$/pom.xml" />
+      </list>
+    </option>
+  </component>
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_22" default="true" project-jdk-name="openjdk-22" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
\ No newline at end of file
diff --git a/server/Dockerfile b/server/Dockerfile
index 3cf7d07..d70066b 100644
--- a/server/Dockerfile
+++ b/server/Dockerfile
@@ -1,4 +1,4 @@
-FROM openjdk:17-jdk-slim AS build
+FROM eclipse-temurin:17-jdk-alpine AS build
 
 # copy maven confis
 COPY pom.xml mvnw ./
@@ -14,7 +14,7 @@ RUN ./mvnw dependency:resolve
 COPY src src
 RUN ./mvnw clean package
 
-FROM openjdk:17-jdk-slim
+FROM eclipse-temurin:17-jre-alpine
 WORKDIR server
 COPY --from=build target/*.jar server-1.0.jar
 ENTRYPOINT ["java", "-DFCGI_PORT=55555", "-jar", "server-1.0.jar"]
\ No newline at end of file
diff --git a/server/src/main/java/org/web1/Main.java b/server/src/main/java/org/web1/Main.java
index 077ec75..4da9285 100644
--- a/server/src/main/java/org/web1/Main.java
+++ b/server/src/main/java/org/web1/Main.java
@@ -1,6 +1,7 @@
 package org.web1;
 
 import com.fastcgi.*;
+
 import java.util.HashMap;
 import java.util.function.Function;
 
@@ -9,10 +10,11 @@
 import org.web1.DTOs.RequestDTO;
 import org.web1.checkers.Checker;
 import org.web1.checkers.CheckerFunction;
-import org.web1.netUtils.JsonBuilder;
-import org.web1.netUtils.QueryStringToHashmap;
-import org.web1.netUtils.ResponseFactory;
-import org.web1.timer.Timer;
+import org.web1.utils.mappers.JsonBuilder;
+import org.web1.utils.mappers.QueryStringToHashmap;
+import org.web1.utils.responce.ResponseFactory;
+import org.web1.utils.responce.ResponseStatus;
+import org.web1.utils.timer.Timer;
 
 public class Main {
     private static final Function<String, HashMap<String,String>> parseQuery = new QueryStringToHashmap();
@@ -46,13 +48,16 @@ public static void main(String[] args) {
                 String result = ResponseFactory.create(
                         new JsonBuilder()
                                 .add("result", checkResult)
-                                .add("elapsedTimeNs", timer.stop())
+                                .add("elapsedTimeNs", timer.stop()),
+                        ResponseStatus.OK
                 );
 
                 System.out.println(result);
             } catch (ValidationException e) {
                 String result = ResponseFactory.create(
-                        new JsonBuilder().add("error", '"'+e.getMessage()+'"')
+                        new JsonBuilder()
+                                .add("error", '"'+e.getMessage()+'"'),
+                        ResponseStatus.BAD_REQUEST
                 );
                 System.out.println(result);
             }
diff --git a/server/src/main/java/org/web1/netUtils/ResponseFactory.java b/server/src/main/java/org/web1/netUtils/ResponseFactory.java
deleted file mode 100644
index 1b9a7f2..0000000
--- a/server/src/main/java/org/web1/netUtils/ResponseFactory.java
+++ /dev/null
@@ -1,15 +0,0 @@
-package org.web1.netUtils;
-
-public class ResponseFactory {
-    private static final String BASE_RESPONSE = """
-            Access-Control-Allow-Origin: *
-            Connection: keep-alive
-            Content-Type: application/json
-            Content-Length: %d
-            
-            %s""";
-    public static String create(JsonBuilder jsonBuilder) {
-        String response = jsonBuilder.build();
-        return String.format(BASE_RESPONSE, response.length(), response);
-    }
-}
diff --git a/server/src/main/java/org/web1/netUtils/JsonBuilder.java b/server/src/main/java/org/web1/utils/mappers/JsonBuilder.java
similarity index 94%
rename from server/src/main/java/org/web1/netUtils/JsonBuilder.java
rename to server/src/main/java/org/web1/utils/mappers/JsonBuilder.java
index 809ae58..44c8141 100644
--- a/server/src/main/java/org/web1/netUtils/JsonBuilder.java
+++ b/server/src/main/java/org/web1/utils/mappers/JsonBuilder.java
@@ -1,4 +1,4 @@
-package org.web1.netUtils;
+package org.web1.utils.mappers;
 
 import java.util.HashMap;
 
diff --git a/server/src/main/java/org/web1/netUtils/QueryStringToHashmap.java b/server/src/main/java/org/web1/utils/mappers/QueryStringToHashmap.java
similarity index 95%
rename from server/src/main/java/org/web1/netUtils/QueryStringToHashmap.java
rename to server/src/main/java/org/web1/utils/mappers/QueryStringToHashmap.java
index 2f775e9..5c03c31 100644
--- a/server/src/main/java/org/web1/netUtils/QueryStringToHashmap.java
+++ b/server/src/main/java/org/web1/utils/mappers/QueryStringToHashmap.java
@@ -1,4 +1,4 @@
-package org.web1.netUtils;
+package org.web1.utils.mappers;
 
 import java.util.HashMap;
 import java.util.function.Function;
diff --git a/server/src/main/java/org/web1/utils/responce/ResponseFactory.java b/server/src/main/java/org/web1/utils/responce/ResponseFactory.java
new file mode 100644
index 0000000..7d9f873
--- /dev/null
+++ b/server/src/main/java/org/web1/utils/responce/ResponseFactory.java
@@ -0,0 +1,37 @@
+package org.web1.utils.responce;
+
+import org.web1.utils.mappers.JsonBuilder;
+
+import java.nio.charset.StandardCharsets;
+import java.util.HashMap;
+
+public class ResponseFactory {
+    private static final String BASE_RESPONSE = """
+            HTTP/2 %s\r
+            Status: %s\r
+            Access-Control-Allow-Origin: *\r
+            Connection: keep-alive\r
+            Content-Type: application/json; charset=utf-8\r
+            Content-Length: %d\r
+            \r
+            %s""";
+
+    private static final HashMap<ResponseStatus, String> responseStatus = new HashMap<>();
+
+    static {
+        responseStatus.put(ResponseStatus.BAD_REQUEST, "400");
+        responseStatus.put(ResponseStatus.OK, "200");
+    }
+
+    public static String create(JsonBuilder jsonBuilder, ResponseStatus status) {
+        String response = jsonBuilder.build();
+
+        return String.format(
+                BASE_RESPONSE,
+                responseStatus.get(status),
+                responseStatus.get(status),
+                response.getBytes(StandardCharsets.UTF_8).length + 1,
+                response
+        );
+    }
+}
diff --git a/server/src/main/java/org/web1/utils/responce/ResponseStatus.java b/server/src/main/java/org/web1/utils/responce/ResponseStatus.java
new file mode 100644
index 0000000..99752bf
--- /dev/null
+++ b/server/src/main/java/org/web1/utils/responce/ResponseStatus.java
@@ -0,0 +1,6 @@
+package org.web1.utils.responce;
+
+public enum ResponseStatus {
+    BAD_REQUEST,
+    OK
+}
diff --git a/server/src/main/java/org/web1/timer/Timer.java b/server/src/main/java/org/web1/utils/timer/Timer.java
similarity index 87%
rename from server/src/main/java/org/web1/timer/Timer.java
rename to server/src/main/java/org/web1/utils/timer/Timer.java
index 9531368..199e210 100644
--- a/server/src/main/java/org/web1/timer/Timer.java
+++ b/server/src/main/java/org/web1/utils/timer/Timer.java
@@ -1,4 +1,4 @@
-package org.web1.timer;
+package org.web1.utils.timer;
 
 public class Timer {
     long startTime;