How to Install Outline on Your Synology NAS

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How to Install Outline on Your Synology NAS

Outline is a fast, collaborative team knowledge base and wiki. It lets teams create, edit, and organize documents in real time with Markdown support, comments, and threads. Key features include powerful search, AI-powered answers, Slack integration, public/private sharing, permissions, and customizable branding. It’s open source and can be self-hosted. In this step by step guide I will show you how to install Outline on your Synology NAS using Docker & Portainer.

  • STEP 1

Please Support My work by Making a Donation.

  • STEP 2

InstallĀ Portainer using my step by step guide. If you already have Portainer installed on your Synology NAS, skip this STEP. Attention: Make sure you have installed the latest Portainer version.

  • STEP 3

Make sure you have a synology.me Wildcard Certificate. Follow my guide to get a Wildcard Certificate. If you already have a synology.me Wildcard certificate, skip this STEP.

  • STEP 4

Go toĀ Control PanelĀ /Ā Login PortalĀ /Ā AdvancedĀ Tab / clickĀ Reverse Proxy. Follow the instructions in the image below.

Outline Synology NAS Set up 1

  • STEP 5

Now click the ā€œCreateā€ button. Follow the instructions in the image below.

Outline Synology NAS Set up 2

  • STEP 6

After you click the Create button, the window below will open. Follow the instructions in the image below.

On the General area, set the Reverse Proxy Name description: type in Outline. After that, add the following instructions:

Source:
Protocol:Ā HTTPS
Hostname: outline.yourname.synology.me
Port:Ā 443

Check Enable HSTS

Destination:
Protocol:Ā HTTP
Hostname:Ā localhost
Port:Ā 4997

Outline Synology NAS Set up 3

  • STEP 7

On the Reverse Proxy Rules, click the Custom HeaderĀ tab. ClickĀ CreateĀ and then, from the drop-down menu, clickĀ WebSocket. After you click on WebSocket, two Header Names and two Values will be automatically added. ClickĀ Save. Follow the instructions in the image below.

Synology Proxy WebSocket

  • STEP 8

Go to Control Panel / Network / Connectivity tab/ Check Enable HTTP/2 then click Apply. Follow the instructions in the image below.

Outline Synology NAS Set up 5

  • STEP 9

Go to Control Panel / Security / Advanced tab/ Check Enable HTTP CompressionĀ then click Apply. Follow the instructions in the image below.

Outline Synology NAS Set up 5

  • STEP 10

Go toĀ File StationĀ and open the docker folder. Inside the docker folder, create one new folder and name itĀ outline. Follow the instructions in the image below.
Note: Be careful to enter only lowercase, not uppercase letters.

Outline Synology NAS Set up 6

  • STEP 11

Now create three new folders inside the outline folder that you created at STEP 10Ā and name them data, db and redis. Follow the instructions in the image below.
Note: Be careful to enter only lowercase, not uppercase letters.

Outline Synology NAS Set up 7

  • STEP 12

Follow my step by step guide on how to activate SMTP for your Gmail account. This step is mandatory. Note: If you don’t want to use the easiest way for SMTP with Google and you already have SMTP details from your own Mail Server, you can just skip this STEP and use your personalized email SMTP details instead.

  • STEP 13

Log into Portainer using your username and password. On the left sidebar in Portainer, click onĀ HomeĀ thenĀ Live connect. Follow the instructions in the image below.

Portainer Add Stack NAS 1

On the left sidebar in Portainer, click on StacksĀ thenĀ + Add stack. Follow the instructions in the image below.

Portainer Add Stack NAS 2

  • STEP 14

In the Name field type in outline. Follow the instructions in the image below.

Note: Copy Paste the code below in the Portainer Stacks Web editor.

services:
  db:
    image: postgres:18
    container_name: Outline-DB
    hostname: outline-db
    healthcheck:
      test: ["CMD", "pg_isready", "-q", "-d", "outline", "-U", "outlineuser"]
      timeout: 45s
      interval: 30s
      retries: 10
    security_opt:
      - no-new-privileges:true
    volumes:
      - /volume1/docker/outline/db:/var/lib/postgresql/:rw
    environment:
      POSTGRES_DB: outline
      POSTGRES_USER: outlineuser
      POSTGRES_PASSWORD: outlinepass
    restart: on-failure:5

  redis:
    image: redis:8-alpine
    container_name: Outline-REDIS
    user: 1026:100
    healthcheck:
      test: ["CMD-SHELL", "redis-cli ping || exit 1"]
    hostname: outline-redis
    security_opt:
      - no-new-privileges:true
    volumes:
      - /volume1/docker/outline/redis:/data:rw
    environment:
      TZ: Europe/Bucharest
    restart: on-failure:5

  outline:
    image: outlinewiki/outline:latest
    container_name: Outline
    user: 0:0
    healthcheck:
      test: timeout 10s bash -c ':> /dev/tcp/127.0.0.1/3000' || exit 1
      interval: 10s
      timeout: 5s
      retries: 3
      start_period: 90s
    environment:
      NODE_ENV: production
      TZ: Europe/Bucharest
      URL: https://outline.yourname.synology.me
      DATABASE_URL: postgresql://outlineuser:outlinepass@outline-db:5432/outline?sslmode=disable
      REDIS_URL: redis://redis:6379
      REDIS_COLLABORATION_URL: redis://redis:6379/1
      SECRET_KEY: 09c29b750ab22aed045ebea4a94442f304318688e075b5d468932d776fc6d72b
      UTILS_SECRET: bc948c616ea05e0aa8cbf6927e4432ee011152ee661b102ec2480e5b0722a14c
      SMTP_HOST: smtp.gmail.com
      SMTP_PORT: 465
      SMTP_USERNAME: Your-own-gmail-address
      SMTP_FROM_EMAIL: Your-own-gmail-address
      SMTP_PASSWORD: Your-own-app-password
      FILE_STORAGE: local
      FILE_STORAGE_LOCAL_ROOT_DIR: /var/lib/outline/data:rw
      FILE_STORAGE_UPLOAD_MAX_SIZE: 26214400  #25 MB
    ports:
      - 4997:3000
    volumes:
      - /volume1/docker/outline/data:/var/lib/outline/data:rw
    depends_on:
      db:
        condition: service_healthy
      redis:
        condition: service_healthy
    restart: on-failure:5

Note: Before you paste the code above in the Web editor area below, change the value numbers forĀ userĀ with your own UID and GID values. (Follow my step by step guide on how to do this.)Ā 1026Ā is my personal UID value andĀ 100 is my personal GID value. You have to type in your own values.
Note: Before you paste the code above in the Web editor area below, change the value for TZ.Ā (Select your current Time Zone from this list.)
Note: Before you paste the code above in the Web editor area below, change the value for URLĀ and type in your own synology.me DDNS withĀ https:// at the beginning that you have previously created at STEP 6.
Note: Before you paste the code above in the Web editor area below, change the value for SECRET_KEY.
(šŸŸ¢Click this Link to Generate Your Own Free APP KEY.) šŸ–¼ļøCheck Example Screenshot. (In the prompt, type in the following text: openssl rand -hex 32Ā then hit enter on your Keyboard). šŸ–¼ļøCheck Example Screenshot and copy your SECRET_KEY.
Note: Before you paste the code above in the Web editor area below, change the value for UTILS_SECRET.
(šŸŸ¢Click this Link to Generate Your Own Free APP KEY.) šŸ–¼ļøCheck Example Screenshot. (In the prompt, type in the following text: openssl rand -hex 32Ā then hit enter on your Keyboard). šŸ–¼ļøCheck Example Screenshot and copy your UTILS_SECRET.
Note: Before you paste the code above in the Web editor area below, change the value for SMTP_USERNAMEĀ and type in your own Gmail address. STEP 12.
Note: Before you paste the code above in the Web editor area below, change the value for SMTP_FROM_EMAILĀ and type in your own Gmail address. STEP 12.
Note: Before you paste the code above in the Web editor area below, change the value for SMTP_PASSWORDĀ and type in your own Gmail app password. STEP 12. āš ļøWarning: Do NOT confuse with your own Gmail password. This is the Gmail APP password.

Outline Synology NAS Set up 8

  • STEP 15

Scroll down on the page until you see a button namedĀ Deploy the stack. Click on it. Follow the instructions in the image below. The installation process can take up to a few minutes. It will depend on your Internet speed connection.

Outline Synology NAS Set up 9

  • STEP 16

If everything goes right, you will see the following message at the top right of your screen: ā€œSuccess Stack successfully deployedā€œ.

Portainer Success Stack NAS

  • STEP 17

šŸŸ¢Please Support My work by Making a Donation. Almost 99,9% of the people that install something using my guidesĀ forget to support my work, or justĀ ignoreĀ STEP 1. Iā€™ve been very honest about this aspect of my work since the beginning: I donā€™t run any ADS, I donā€™t require subscriptions, paid or otherwise, I donā€™t collect IPs, emails, and I donā€™t have any referral links from Amazon or other merchants. I also donā€™t have any POP-UPs or COOKIES. I have repeatedly been told over the years how much I have contributed to the community. Itā€™s something I love doing and have been honest about my passion since the beginning. But I also Need The Community to Support me Back to be able to continue doing this work.

  • STEP 18

Now open your browser and type in your HTTPS/SSL certificate like this https://outline.yourname.synology.me In my case, it’s https://outline.mariushosting.synology.me If everything goes right, you will see the Outline setup page. Type in your own Workspace name, Admin name and Admin email. Click Continue. Follow the instructions in the image below.

Outline Synology NAS Set up 10

  • STEP 19

Click Home. On the left sidebar, go to the user Settings. Click Appearance then Dark to switch the theme to Dark. Click + New doc to add your first document. Follow the instructions in the image below.

Outline Synology NAS Set up 11

  • STEP 20

At the top right of the page, click on the 3 horizontal dots. Follow the instructions in the image below.

Outline Synology NAS Set up 12

  • STEP 21

Click Permissions. Follow the instructions in the image below.

Outline Synology NAS Set up 13

  • STEP 22

Select Publish to the web. Copy the auto-generated URL. Follow the instructions in the image below.

Outline Synology NAS Set up 14

  • STEP 23

Your shared link at a glance!

Outline Synology NAS Set up 15

Enjoy Outline!

šŸ†˜TROUBLESHOOTING

Note: Can I run Docker on my Synology NAS?Ā See the supported models.
Note: How to Back Up Docker Containers on your Synology NAS.
Note: Find outĀ how to update the Outline container with the latest image.
Note: How to Free Disk Space on Your NAS if You Run Docker.
Note: Instead of the synology.me DDNS you can also use your own domain name.
Note: How to Schedule Start & Stop For Docker Containers.
Note: How to Activate Email Notifications.
Note: How to Add Access Control Profile on Your NAS.
Note: How to Change Docker Containers Restart Policy.
Note: How to Use Docker Containers With VPN.
Note: Convert Docker Run Into Docker Compose.
Note: How to Clean Docker.
Note: How to Clean Docker Automatically.
Note: Best Practices When Using Docker and DDNS.
Note: Some Docker Containers Need WebSocket.
Note: Find out the Best NAS Models For Docker.
Note: Activate Gmail SMTP For Docker Containers.

This post was updated on Sunday / June 7th, 2026 at 2:17 PM

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