# Submission Instructions

To submit your agent to the tournament server, you will need to push your Docker image to a public registry and upload your link to the [Submissions page](https://www.gocoder.one/submissions). 

We will pull the **latest** image directly from the registry.

You can use any public registry. Follow instructions below for Docker Hub:

### **Step 1: Check your connection and production build**

Make sure your agent has a `GAME_CONNECTION_STRING` as an **environment variable** (and not as a hard-coded string).

{% tabs %}
{% tab title="TypeScript" %}

```typescript
const gameConnectionString = process.env["GAME_CONNECTION_STRING"]
```

{% endtab %}

{% tab title="Python" %}

```python
uri = os.environ.get(
    'GAME_CONNECTION_STRING')
```

{% endtab %}
{% endtabs %}

{% hint style="info" %}
You can check that your agent is production-ready by switching your agent services in `docker-compose.yml` for services provided in `base-compose.yml` that do **not** have the `dev` label. These services do **not** mount your host volume to the container and are therefore more representative of a production-ready build. More info on how to do this [here](https://docs.gocoder.one/other/faq#how-do-i-change-what-agents-are-playing).
{% endhint %}

If it builds correctly with `docker-compose up` it should be OK to submit.

### Step 2: Set up Docker Hub

If you haven't already, create a free Docker Hub account [here](https://hub.docker.com/).

Login from your terminal using the command `docker login`. 

### Step 3: Push the image to Docker Hub

Navigate to the working directory containing your agent's Dockerfile. Then run in your terminal:

```bash
docker build . -t my-dockerhub-username/my-repo-name
docker push my-dockerhub-username/my-repo-name
```

You will see output similar to:

```bash
> docker push my-dockerhub-username/my-repo-name     
Using default tag: latest
#### ↓ ~~~~~~ SEND US THIS LINK ~~~~~~ ↓ ####
The push refers to repository [docker.io/my-dockerhub-username/my-repo-name]
b972422d72dd: Pushed
c1ee23f20937: Pushed
...
```

Upload the public registry link to the [Submissions page](https://www.gocoder.one/submissions).