chore: Migrate to Java 21 and remove usage of Java 17 (DEV-3146) (#2974)

.github/workflows/build-and-test.yml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        java: [ "17", "21" ]
+        java: [ "21" ]
     steps:
       - name: Run preparatory steps
         uses: dasch-swiss/dsp-api/.github/actions/preparation@main
@@ -42,7 +42,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        java: [ "17", "21" ]
+        java: [ "21" ]
     concurrency:
       group: ${{ github.ref }}-${{ matrix.java }}-it
       cancel-in-progress: true

.github/workflows/scala-steward.yml

@@ -11,11 +11,11 @@ jobs:
     runs-on: ubuntu-latest
     name: Launch Scala Steward
     steps:
-      - name: Set up JDK 17
+      - name: Set up JDK 21
         uses: actions/setup-java@v3
         with:
           distribution: 'temurin'
-          java-version: '17'
+          java-version: '21'
       - name: Launch Scala Steward
         uses: scala-steward-org/scala-steward-action@v2
         with:

build.sbt

@@ -217,7 +217,7 @@ lazy val webapi: Project = Project(id = "webapi", base = file("webapi"))
     Docker / dockerRepository := Some("daschswiss"),
     Docker / packageName      := "knora-api",
     dockerUpdateLatest        := true,
-    dockerBaseImage           := "eclipse-temurin:17-jre-focal",
+    dockerBaseImage           := "eclipse-temurin:21-jre-jammy",
     dockerBuildxPlatforms     := Seq("linux/arm64/v8", "linux/amd64"),
     Docker / maintainer       := "[email protected]",
     Docker / dockerExposedPorts ++= Seq(3333, 3339),