Update 'build-minecraft.jenkins'

build-minecraft.jenkins

@@ -34,6 +34,12 @@ spec:
     tty: true
     command:
     - /busybox/cat
+  - name: alpine
+    image: ${repository}/library/alpine:latest
+    imagePullPolicy: Always
+    tty: true
+    command:
+    - /bin/sh
 """) {
 	node (nodeLabel) {
 		// Set working directory
@@ -88,12 +94,21 @@ CMD cd data; java -Xms${memoryMin} -Xmx${memoryMax} -jar ../paper-mc.jar
 		}
 
 		stage ("Build & Push") {
+            container ("alpine") {
+                sh "apk add --no-cache curl jq"
+                paperDownload = sh (
+                    script: """
+					    paperBuild=\$(curl --silent --location --fail https://papermc.io/api/v2/projects/paper/versions/${paperVersion} | jq '.builds | max')
+					    paperFile=\$(curl --silent --location --fail https://papermc.io/api/v2/projects/paper/versions/${paperVersion}/builds/\${paperBuild} | jq '.downloads.application.name')
+					    echo https://papermc.io/api/v2/projects/paper/versions/${paperVersion}/builds/\${paperBuild}/downloads/\${paperFile}
+                    """
+				    returnStdout: true
+			    ).trim()
+            }
+
 			container ("kaniko") {
 				sh """
-					paperBuild=\$(curl --silent --location --fail https://papermc.io/api/v2/projects/paper/versions/${paperVersion} | jq '.builds | max')
+					/kaniko/executor --cleanup --context "${workspace}" -f "${workspace}/Dockerfile" --destination "${repository}/library/minecraft:latest" --build-arg "paperDownload=${paperDownload}"
-					paperFile=\$(curl --silent --location --fail https://papermc.io/api/v2/projects/paper/versions/${paperVersion}/builds/\${paperBuild} | jq '.downloads.application.name')
-					paperDownload="https://papermc.io/api/v2/projects/paper/versions/${paperVersion}/builds/\${paperBuild}/downloads/\${paperFile}"
-					/kaniko/executor --cleanup --context "${workspace}" -f "${workspace}/Dockerfile" --destination "${repository}/library/minecraft:latest" --build-arg "paperDownload=\${paperDownload}"
 				"""
 			}
 		}