Workaround issue with mn gradle plugin when setting docker base image

micronaut-projects/micronaut-gradle-plugin#820

build.gradle

@@ -80,9 +80,11 @@ test {
 }
 
 tasks {
-    dockerfile {
-        baseImage = 'amazoncorretto:17-alpine3.18'
-    }
+// TODO: set this configuration once issue https://github.com/micronaut-projects/micronaut-gradle-plugin/issues/820
+//       is solved.
+//    dockerfile {
+//        baseImage = 'amazoncorretto:17-alpine3.18'
+//    }
 
     dockerBuild {
         images = ["${System.env.DOCKER_IMAGE ?: project.name}:$project.version"]

scripts/Dockerfile

@@ -0,0 +1,10 @@
+FROM amazoncorretto:17-alpine3.18
+
+COPY build/libs/ses-notification-lambda-test-all.jar /home/not-root/application.jar
+
+# Configure non-root user
+RUN addgroup -g 3000 not-root \
+    && adduser -u 1000 -s /bin/false -D -G not-root not-root
+USER not-root
+
+ENTRYPOINT ["java", "-jar", "/home/not-root/application.jar"]

scripts/dockerBuildAndPush.sh

@@ -0,0 +1,16 @@
+#! /usr/bin/env sh
+
+###############################################################################
+# This script is used in place of `./gradlew dockerPush` because of an issue
+# that prevents us from selecting the base container issue we want to use.
+#
+# https://github.com/micronaut-projects/micronaut-gradle-plugin/issues/820
+###############################################################################
+
+if [ -z "${DOCKER_IMAGE}" ]; then
+    echo "Need a container image in env var DOCKER_IMAGE" && exit 1
+fi
+
+./gradlew assemble
+docker build . -f scripts/Dockerfile -t "${DOCKER_IMAGE}"
+docker push "${DOCKER_IMAGE}"

terraform/build-container.tf

@@ -7,7 +7,10 @@ resource "null_resource" "build_container" {
   provisioner "local-exec" {
     working_dir = dirname(path.cwd)
 
-    command = "DOCKER_IMAGE=${local.container_image} ./gradlew dockerPush"
+    command = "DOCKER_IMAGE=${local.container_image} scripts/dockerBuildAndPush.sh"
+    # TODO: use gradle task dockerPush when issue https://github.com/micronaut-projects/micronaut-gradle-plugin/issues/820
+    #       has been solved.
+    #    command = "DOCKER_IMAGE=${local.container_image} ./gradlew dockerPush"
   }
 
   depends_on = [null_resource.login_ecr]