update to java 21

.github/workflows/build.yml

@@ -10,10 +10,10 @@ jobs:
 
     steps:
       - uses: actions/checkout@v4
-      - uses: actions/setup-java@v3
+      - uses: actions/setup-java@v4
         with:
           distribution: 'temurin'
-          java-version: '20'
+          java-version: '21'
       - run: make build
       - run: make test
 

Dockerfile

@@ -10,9 +10,7 @@ COPY frontend /frontend
 
 RUN npm run build
 
-FROM eclipse-temurin:20-jdk
-
-ARG GRADLE_VERSION=8.3
+FROM eclipse-temurin:21-jdk
 
 RUN apt-get update && apt-get install -yq make unzip
 

Makefile

@@ -1,6 +1,6 @@
 setup:
 	npm install
-	./gradlew wrapper --gradle-version 8.5
+	./gradlew wrapper --gradle-version 8.7
 	./gradlew build
 
 frontend:

build.gradle.kts

@@ -4,8 +4,8 @@ import org.gradle.api.tasks.testing.logging.TestLogEvent
 plugins {
     application
     // "checkstyle"
-    id("io.freefair.lombok") version "8.4"
-    id("org.springframework.boot") version "3.2.0"
+    id("io.freefair.lombok") version "8.6"
+    id("org.springframework.boot") version "3.2.4"
     id("io.spring.dependency-management") version "1.1.4"
     id("com.github.ben-manes.versions") version "0.50.0"
 }

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.5-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.7-bin.zip
 networkTimeout=10000
 validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME

gradlew.bat

@@ -43,11 +43,11 @@ set JAVA_EXE=java.exe
 %JAVA_EXE% -version >NUL 2>&1
 if %ERRORLEVEL% equ 0 goto execute
 
-echo.
-echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
-echo.
-echo Please set the JAVA_HOME variable in your environment to match the
-echo location of your Java installation.
+echo. 1>&2
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
 
 goto fail
 
@@ -57,11 +57,11 @@ set JAVA_EXE=%JAVA_HOME%/bin/java.exe
 
 if exist "%JAVA_EXE%" goto execute
 
-echo.
-echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
-echo.
-echo Please set the JAVA_HOME variable in your environment to match the
-echo location of your Java installation.
+echo. 1>&2
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
 
 goto fail