diff --git a/.devcontainer/devcontainer.json b/.devcontainer/devcontainer.json
new file mode 100644
index 000000000..0bef4f175
--- /dev/null
+++ b/.devcontainer/devcontainer.json
@@ -0,0 +1,22 @@
+// For format details, see https://aka.ms/devcontainer.json. For config options, see the
+// README at: https://github.com/devcontainers/templates/tree/main/src/debian
+{
+	"name": "Debian",
+	// Or use a Dockerfile or Docker Compose file. More info: https://containers.dev/guide/dockerfile
+	"image": "mcr.microsoft.com/devcontainers/base:trixie",
+	"features": {
+		"ghcr.io/devcontainers/features/node:1": {}
+	}
+
+	// Features to add to the dev container. More info: https://containers.dev/features.
+	// "features": {},
+
+	// Use 'forwardPorts' to make a list of ports inside the container available locally.
+	// "forwardPorts": [],
+
+	// Configure tool-specific properties.
+	// "customizations": {},
+
+	// Uncomment to connect as root instead. More info: https://aka.ms/dev-containers-non-root.
+	// "remoteUser": "root"
+}
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
new file mode 100644
index 000000000..9cd2d2b67
--- /dev/null
+++ b/.gitlab-ci.yml
@@ -0,0 +1,41 @@
+stages:
+  - build
+  - publish
+
+build_image:
+  stage: build
+  image:
+    name: gcr.io/kaniko-project/executor:debug
+    entrypoint: [""]
+  script:
+    - |-
+      tag=$CI_COMMIT_SHORT_SHA
+      if [[ -n "$CI_COMMIT_TAG" ]]; then
+        tag=$CI_COMMIT_TAG
+      fi
+    - mkdir -p /kaniko/.docker
+    - echo "{\"auths\":{\"$CI_REGISTRY\":{\"username\":\"$CI_REGISTRY_USER\",\"password\":\"$CI_REGISTRY_PASSWORD\"}}}" > /kaniko/.docker/config.json
+    - >
+      /kaniko/executor 
+      --context $CI_PROJECT_DIR
+      --dockerfile $CI_PROJECT_DIR/Dockerfile
+      --destination $CI_REGISTRY_IMAGE:${tag}
+      --cache=true
+
+push_image_harbor:
+  stage: publish
+  image:
+    name: gcr.io/kaniko-project/executor:debug
+    entrypoint: ['']
+  script:
+    - mkdir -p /kaniko/.docker
+    - echo "{\"auths\":{\"${HARBOR_HOST}\":{\"auth\":\"$(echo -n ${HARBOR_USERNAME}:${HARBOR_PASSWORD} | base64 -w 0)\"}}}" > /kaniko/.docker/config.json
+    - >-
+      /kaniko/executor
+      --context "${CI_PROJECT_DIR}"
+      --dockerfile ${CI_PROJECT_DIR}/Dockerfile
+      --destination "${HARBOR_HOST}/${HARBOR_PROJECT}/${CI_PROJECT_NAME}:${CI_COMMIT_TAG}"
+      --cache=true
+  rules:
+  - if: $CI_COMMIT_TAG
+
diff --git a/nest-cli.json b/nest-cli.json
index 473da2a0a..b273600d6 100644
--- a/nest-cli.json
+++ b/nest-cli.json
@@ -2,6 +2,9 @@
   "collection": "@nestjs/schematics",
   "sourceRoot": "src",
   "compilerOptions": {
+    "assets": [
+      { "include": "common/email-templates/*.hbs", "watchAssets": true }
+    ],
     "plugins": [{
       "name": "@nestjs/swagger",
       "options": {
diff --git a/src/common/common.module.ts b/src/common/common.module.ts
index b43ed68bb..35bbb9ab7 100644
--- a/src/common/common.module.ts
+++ b/src/common/common.module.ts
@@ -1,5 +1,5 @@
 import { Module } from "@nestjs/common";
-import { MailService } from "./mail.service";
+import { MailService } from "./services/mail.service";
 
 @Module({
   providers: [MailService],
diff --git a/src/common/email-templates/doi-registered.hbs b/src/common/email-templates/doi-registered.hbs
new file mode 100644
index 000000000..8ece3d055
--- /dev/null
+++ b/src/common/email-templates/doi-registered.hbs
@@ -0,0 +1,8 @@
+<p>Hello,</p>
+
+<p>Your DOI has been successfully registered: <strong><a href="{{exchangeString registerDoiUri "api" "doi"}}{{{urlencode doi}}}">{{doi}}</a></strong></p>
+
+<p>Please proceed to DESY's publication database <a href="https://bib-pubdb1.desy.de/submit/direct?ln=en&sub=SBIdataset&hgf_import={{{urlencode doi}}}">PubDB.</a></p>
+
+<p>Best regards,<br>
+Your Service Team</p>
\ No newline at end of file
diff --git a/src/common/handlebars-helpers.ts b/src/common/handlebars-helpers.ts
index d52dc4a2c..58fea4e9e 100644
--- a/src/common/handlebars-helpers.ts
+++ b/src/common/handlebars-helpers.ts
@@ -132,6 +132,9 @@ export const urlencode = (context: string): string => {
   return encodeURIComponent(context);
 };
 
+export const exchangeString = (registerDoiUri: string, search: string, replacement: string): string => {
+    return registerDoiUri.replace(search, replacement);
+};
 /**
  * Format a unit using mathjs.
  *
@@ -191,6 +194,7 @@ export const handlebarsHelpers: hb.HelperDeclareSpec = {
   jsonify: jsonify,
   job_v3: job_v3,
   urlencode: urlencode,
+  exchangeString: exchangeString,
   base64enc: base64enc,
   base64dec: atob,
   formatUnit: formatUnit,
diff --git a/src/common/mail.service.ts b/src/common/services/mail.service.ts
similarity index 55%
rename from src/common/mail.service.ts
rename to src/common/services/mail.service.ts
index 705276505..b3f0cc7d8 100644
--- a/src/common/mail.service.ts
+++ b/src/common/services/mail.service.ts
@@ -1,5 +1,6 @@
 import { ISendMailOptions, MailerService } from "@nestjs-modules/mailer";
 import { Injectable, Logger } from "@nestjs/common";
+import { ConfigService } from "@nestjs/config";
 import { isAxiosError } from "@nestjs/terminus/dist/utils";
 import { SentMessageInfo } from "nodemailer";
 
@@ -10,7 +11,10 @@ import { SentMessageInfo } from "nodemailer";
  */
 @Injectable()
 export class MailService {
-  constructor(private readonly mailerService: MailerService) {}
+  constructor(
+    private readonly mailerService: MailerService,
+    private readonly configService: ConfigService,
+  ) {}
 
   async sendMail(options: ISendMailOptions): Promise<SentMessageInfo> {
     try {
@@ -39,4 +43,32 @@ export class MailService {
       }
     }
   }
+
+  async sendTemplateEmail(doi: string, userEmail: string): Promise<void> {
+    const templateName = "doi-registered"; // hdb
+    const registerDoiUri = this.configService.get<string>("registerDoiUri");
+    Logger.debug(`registerDoiUri is ${registerDoiUri}`);
+    
+    try {
+      const mailOptions: ISendMailOptions = {
+        to: userEmail,
+        subject: `DOI registration confirmed: ${doi}.`,
+        template: templateName,
+        context: {
+          registerDoiUri: registerDoiUri,
+          doi: doi,
+        },
+      };
+
+      if (!mailOptions.template) {
+        throw new Error("INTERNAL ERROR: template property is missing!");
+      }
+
+      Logger.debug(`mailOptions: ${JSON.stringify(mailOptions)}`);
+      await this.sendMail(mailOptions);
+      Logger.log(`DOI registration email sent to ${userEmail}.`);
+    } catch (error) {
+      Logger.error(`Failed to send email: ${JSON.stringify(error)}`);
+    }
+  }
 }
diff --git a/src/config/configuration.ts b/src/config/configuration.ts
index b613033ef..0e318fa3e 100644
--- a/src/config/configuration.ts
+++ b/src/config/configuration.ts
@@ -4,6 +4,7 @@ import localconfiguration from "./localconfiguration";
 import { boolean } from "mathjs";
 import { DEFAULT_PROPOSAL_TYPE } from "src/proposals/schemas/proposal.schema";
 import { DatasetType } from "src/datasets/types/dataset-type.enum";
+import { Logger } from "@nestjs/common";
 
 const configuration = () => {
   const accessGroupsStaticValues =
@@ -85,12 +86,14 @@ const configuration = () => {
     publishedDataConfig:
       process.env.PUBLISHED_DATA_CONFIG_FILE || "publishedDataConfig.json",
   };
+
   Object.keys(jsonConfigFileList).forEach((key) => {
     const filePath = jsonConfigFileList[key];
     if (fs.existsSync(filePath)) {
       const data = fs.readFileSync(filePath, "utf8");
       try {
         jsonConfigMap[key] = JSON.parse(data);
+        Logger.debug(`From ${filePath} parsing data ${data}.`);
       } catch (error) {
         console.error(
           "Error json config file parsing " + filePath + " : " + error,
@@ -123,6 +126,7 @@ const configuration = () => {
             `Example configuration file ${exampleFilePath} does not exist. Using empty configuration for ${key}`,
           );
           jsonConfigMap[key] = {};
+          Logger.debug(`jsonConfigMap[key] is ${jsonConfigMap[key]}`);
         }
       }
     }
diff --git a/src/config/job-config/actions/emailaction/emailaction.service.ts b/src/config/job-config/actions/emailaction/emailaction.service.ts
index cdc217aa3..669a8d90a 100644
--- a/src/config/job-config/actions/emailaction/emailaction.service.ts
+++ b/src/config/job-config/actions/emailaction/emailaction.service.ts
@@ -6,7 +6,7 @@ import {
 } from "../../jobconfig.interface";
 import { isEmailJobActionOptions } from "./emailaction.interface";
 import { EmailJobAction } from "./emailaction";
-import { MailService } from "src/common/mail.service";
+import { MailService } from "src/common/services/mail.service";
 
 @Injectable()
 export class EmailJobActionCreator implements JobActionCreator<JobDto> {
diff --git a/src/config/job-config/actions/emailaction/emailaction.spec.ts b/src/config/job-config/actions/emailaction/emailaction.spec.ts
index a9c3c3b90..e1fafafc8 100644
--- a/src/config/job-config/actions/emailaction/emailaction.spec.ts
+++ b/src/config/job-config/actions/emailaction/emailaction.spec.ts
@@ -11,7 +11,7 @@
 import { EmailJobAction } from "./emailaction";
 import { EmailJobActionOptions } from "./emailaction.interface";
 import { JobClass } from "../../../../jobs/schemas/job.schema";
-import { MailService } from "src/common/mail.service";
+import { MailService } from "src/common/services/mail.service";
 import { MailerService } from "@nestjs-modules/mailer";
 import { DatasetClass } from "src/datasets/schemas/dataset.schema";
 import { CreateJobDto } from "src/jobs/dto/create-job.dto";
diff --git a/src/config/job-config/actions/emailaction/emailaction.ts b/src/config/job-config/actions/emailaction/emailaction.ts
index 11a77db7b..b5efe01ce 100644
--- a/src/config/job-config/actions/emailaction/emailaction.ts
+++ b/src/config/job-config/actions/emailaction/emailaction.ts
@@ -13,7 +13,7 @@ import {
 } from "../../jobconfig.interface";
 import { ISendMailOptions } from "@nestjs-modules/mailer";
 import { actionType, EmailJobActionOptions } from "./emailaction.interface";
-import { MailService } from "src/common/mail.service";
+import { MailService } from "src/common/services/mail.service";
 
 /**
  * Send an email following a job
diff --git a/src/jobs/jobs.service.spec.ts b/src/jobs/jobs.service.spec.ts
index 2016267c5..1662fd1f7 100644
--- a/src/jobs/jobs.service.spec.ts
+++ b/src/jobs/jobs.service.spec.ts
@@ -2,7 +2,7 @@ import { ConfigService } from "@nestjs/config";
 import { getModelToken } from "@nestjs/mongoose";
 import { Test, TestingModule } from "@nestjs/testing";
 import { Model } from "mongoose";
-import { MailService } from "src/common/mail.service";
+import { MailService } from "src/common/services/mail.service";
 import { DatasetsService } from "src/datasets/datasets.service";
 import { DatasetsAccessService } from "src/datasets/datasets-access.service";
 import { PoliciesService } from "src/policies/policies.service";
diff --git a/src/published-data/published-data.module.ts b/src/published-data/published-data.module.ts
index 3878ac7bd..682f03c01 100644
--- a/src/published-data/published-data.module.ts
+++ b/src/published-data/published-data.module.ts
@@ -18,6 +18,7 @@ import {
 } from "./schemas/published-data.schema";
 import { applyHistoryPluginOnce } from "src/common/mongoose/plugins/history.plugin.util";
 import { PublishedDataV4Controller } from "./published-data.v4.controller";
+import { MailService } from "src/common/services/mail.service";
 
 @Module({
   imports: [
@@ -65,6 +66,6 @@ import { PublishedDataV4Controller } from "./published-data.v4.controller";
     ProposalsModule,
   ],
   controllers: [PublishedDataController, PublishedDataV4Controller],
-  providers: [PublishedDataService],
+  providers: [PublishedDataService, MailService],
 })
 export class PublishedDataModule {}
diff --git a/src/published-data/published-data.v4.controller.ts b/src/published-data/published-data.v4.controller.ts
index 6f25c91dc..dc44cb23d 100644
--- a/src/published-data/published-data.v4.controller.ts
+++ b/src/published-data/published-data.v4.controller.ts
@@ -57,6 +57,8 @@ import {
   PublishedData,
   PublishedDataDocument,
 } from "./schemas/published-data.schema";
+import { MailService } from "src/common/services/mail.service";
+import { logger } from "handlebars";
 
 @ApiBearerAuth()
 @ApiTags("published data v4")
@@ -76,6 +78,7 @@ export class PublishedDataV4Controller {
     private readonly proposalsService: ProposalsService,
     private readonly publishedDataService: PublishedDataService,
     private caslAbilityFactory: CaslAbilityFactory,
+    private readonly mailService: MailService,
   ) {}
 
   @AllowAny()
@@ -617,6 +620,9 @@ export class PublishedDataV4Controller {
       };
 
       try {
+
+        console.log("registerDataciteDoiOptions is", JSON.stringify(registerDataciteDoiOptions));
+        
         await firstValueFrom(
           this.httpService.request(registerDataciteDoiOptions),
         );
@@ -636,6 +642,12 @@ export class PublishedDataV4Controller {
       { status: PublishedDataStatus.REGISTERED, registeredTime: new Date() },
     );
 
+    const user = request.user as JWTUser;
+    await this.mailService.sendTemplateEmail(
+      publishedData.doi, // Replacements for the template
+      user.email, // Recipient email
+    );
+
     return res;
   }