Update actions/checkout to v4

Update actions/setup-java to v4
Update actions/upload-artifact to v4
Update Java to 21

Author: yokra9

.devcontainer/Dockerfile

@@ -1,5 +1,4 @@
-# [Choice] Java version: 11, 15
-ARG VARIANT=11
+ARG VARIANT=21
 FROM mcr.microsoft.com/vscode/devcontainers/java:${VARIANT}
 
 # [Option] Install Maven

.devcontainer/devcontainer.json

@@ -3,8 +3,7 @@
 	"build": {
 		"dockerfile": "Dockerfile",
 		"args": {
-			// Update the VARIANT arg to pick a Java version: 11, 15
-			"VARIANT": "11",
+			"VARIANT": "21",
 			// Options
 			"INSTALL_MAVEN": "false",
 			"INSTALL_GRADLE": "false",

.github/workflows/Test.yml

@@ -15,19 +15,19 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v3
-    - name: Set up JDK 11
-      uses: actions/setup-java@v3
+    - uses: actions/checkout@v4
+    - name: Set up JDK 21
+      uses: actions/setup-java@v4
       with:
-        java-version: '11'
+        java-version: '21'
         distribution: 'temurin'
         cache: 'sbt'
 
     - name: Run tests and create coverage report
       run: sbt clean coverage test assembly coverageReport
 
     - name: Upload coverage report
-      uses: actions/upload-artifact@v3
+      uses: actions/upload-artifact@v4
       with:
         name: scoverage-report
-        path: target/scala-2.13/scoverage-report/
+        path: target/scala-*/scoverage-report/

build.sbt

@@ -16,12 +16,13 @@ enablePlugins(DockerPlugin)
 Docker / packageName := "sample-webapp"
 Docker / version := "2.0.0"
 
-dockerBaseImage := "openjdk:latest"
+dockerBaseImage := "eclipse-temurin:latest"
 dockerExposedPorts := List(8080)
 
 assembly / mainClass := Some("Main")
 ThisBuild / assemblyMergeStrategy := {
-  case "module-info.class" => MergeStrategy.discard
+  case PathList(ps @ _*) if ps.last endsWith "module-info.class" =>
+    MergeStrategy.discard
   case x =>
     val oldStrategy = (assembly / assemblyMergeStrategy).value
     oldStrategy(x)