ci/build: use jdk 21 temurin for builds and docker base image

Author: tronghn

.github/workflows/build-master.yml

@@ -14,11 +14,11 @@ jobs:
     steps:
       - name: Checkout latest code
         uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # ratchet:actions/checkout@v5
-      - name: Set up JDK 17
+      - name: Set up JDK 21
         uses: actions/setup-java@dded0888837ed1f317902acf8a20df0ad188d165 # ratchet:actions/setup-java@v5
         with:
-          java-version: 17
-          distribution: 'zulu'
+          java-version: 21
+          distribution: 'temurin'
           cache: 'gradle'
       - name: Setup Gradle
         uses: gradle/actions/setup-gradle@017a9effdb900e5b5b2fddfb590a105619dca3c3 # ratchet:gradle/actions/setup-gradle@v4

.github/workflows/dokka.yml

@@ -17,11 +17,11 @@ jobs:
       - name: Checkout latest code
         uses: actions/checkout@v5
 
-      - name: Set up JDK 17
+      - name: Set up JDK 21
         uses: actions/setup-java@v5
         with:
-          java-version: 17
-          distribution: 'zulu'
+          java-version: 21
+          distribution: 'temurin'
           cache: 'gradle'
 
       - name: Get the tag name

.github/workflows/manual_testing.yml

@@ -15,11 +15,11 @@ jobs:
         with:
           ref: add-arm64-architecture
 
-      - name: Set up JDK 17
+      - name: Set up JDK 21
         uses: actions/setup-java@v5
         with:
-          java-version: 17
-          distribution: 'zulu'
+          java-version: 21
+          distribution: 'temurin'
           cache: 'gradle'
 
       - name: Build JVM stuff

.github/workflows/publish-release.yml

@@ -13,11 +13,11 @@ jobs:
     steps:
       - name: Checkout latest code
         uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # ratchet:actions/checkout@v5
-      - name: Set up JDK 17
+      - name: Set up JDK 21
         uses: actions/setup-java@dded0888837ed1f317902acf8a20df0ad188d165 # ratchet:actions/setup-java@v5
         with:
-          java-version: 17
-          distribution: 'zulu'
+          java-version: 21
+          distribution: 'temurin'
           cache: 'gradle'
       - name: Login to GitHub Container Registry
         uses: docker/login-action@184bdaa0721073962dff0199f1fb9940f07167d1 # ratchet:docker/login-action@v3

.github/workflows/test-pr.yaml

@@ -12,11 +12,11 @@ jobs:
       - name: Checkout latest code
         uses: actions/checkout@v5
 
-      - name: Set up JDK 17
+      - name: Set up JDK 21
         uses: actions/setup-java@v5
         with:
-          java-version: 17
-          distribution: 'zulu'
+          java-version: 21
+          distribution: 'temurin'
           cache: 'gradle'
 
       - name: Build with Gradle

build.gradle.kts

@@ -1,4 +1,3 @@
-import java.time.Duration
 import com.github.benmanes.gradle.versions.updates.DependencyUpdatesTask
 import org.jetbrains.kotlin.gradle.dsl.JvmTarget
 import org.jetbrains.kotlin.gradle.dsl.KotlinVersion
@@ -207,7 +206,7 @@ jib {
                 os = "linux"
             }
         }
-        image = "gcr.io/distroless/java17-debian12"
+        image = "gcr.io/distroless/java21-debian12"
     }
     container {
         ports = listOf("8080")