feat(build): use chainguard jre:latest-dev base image for docker healthcheck support (#882)

Resolves #784, supercedes #811.

Author: tronghn

build.gradle.kts

@@ -27,7 +27,6 @@ plugins {
     id("com.github.ben-manes.versions") version "0.52.0"
     id("org.jmailen.kotlinter") version "5.2.0"
     id("com.google.cloud.tools.jib") version "3.4.5"
-    id("com.github.johnrengelman.shadow") version "8.1.1"
     id("com.vanniktech.maven.publish") version "0.34.0"
     id("org.jetbrains.dokka") version "2.0.0"
     `java-library`
@@ -206,18 +205,17 @@ jib {
                 os = "linux"
             }
         }
-        image = "gcr.io/distroless/java21-debian12"
+        image = "cgr.dev/chainguard/jre:latest-dev"
     }
     container {
         ports = listOf("8080")
         mainClass = mainClassKt
+        jvmFlags = listOf(
+            "--sun-misc-unsafe-memory-access=allow", // see https://netty.io/wiki/java-24-and-sun.misc.unsafe.html
+        )
     }
 }
 
-(components["java"] as AdhocComponentWithVariants).withVariantsFromConfiguration(configurations["shadowRuntimeElements"]) {
-    skip()
-}
-
 fun isNonStable(version: String): Boolean {
     val stableKeyword = listOf("RELEASE", "FINAL", "GA").any { version.uppercase().contains(it) }
     val regex = "^[0-9,.v-]+(-r)?$".toRegex()
@@ -248,27 +246,11 @@ tasks {
         dependsOn("formatKotlin")
     }
 
-    withType<com.github.jengelman.gradle.plugins.shadow.tasks.ShadowJar> {
-        archiveBaseName.set("app")
-        archiveClassifier.set("")
-        manifest {
-            attributes(
-                mapOf(
-                    "Main-Class" to mainClassKt
-                )
-            )
-        }
-    }
-
     withType<Test> {
         jvmArgs("--add-opens=java.base/java.util=ALL-UNNAMED")
         useJUnitPlatform()
     }
 
-    "jibDockerBuild" {
-        dependsOn("shadowJar")
-    }
-
     withType<Wrapper> {
         gradleVersion = "8.14.1"
     }

docker-compose-ssl.yaml

@@ -1,5 +1,3 @@
-version: "3.1"
-
 services:
   mock-oauth2-server:
     image: mock-oauth2-server:latest
@@ -11,3 +9,9 @@ services:
       LOG_LEVEL: "debug"
       SERVER_PORT: 8080
       JSON_CONFIG_PATH: /app/config.json
+    healthcheck:
+      test: [ "CMD", "wget", "--no-verbose", "--tries=1", "--spider", "http://localhost:8080/isalive" ]
+      start_period: 5s
+      retries: 10
+      interval: 2s
+      timeout: 1s

docker-compose.yaml

@@ -1,5 +1,3 @@
-version: "3.1"
-
 services:
   mock-oauth2-server:
     image: mock-oauth2-server:latest
@@ -13,3 +11,9 @@ services:
       LOG_LEVEL: "debug"
       SERVER_PORT: 8080
       JSON_CONFIG_PATH: /app/config.json
+    healthcheck:
+      test: [ "CMD", "wget", "--no-verbose", "--tries=1", "--spider", "http://localhost:8080/isalive" ]
+      start_period: 5s
+      retries: 10
+      interval: 2s
+      timeout: 1s