Feature/sheeprl upgrade (#33)

* feat: bump sheeprl to v0.5.5

* feat: update docs

* feat: added sheeprl section

* feat: variable renaming

* fix: typos

* feat: update sheeprl version

* feat: update

content/competitionPlatform/howToSubmitAnAgent/submitYourOwnAgent/_index.en.md

@@ -157,6 +157,47 @@ To do so, you would need to:
   ```
   Also in this case, the Hugging Face token you saved earlier will be automatically retrieved.
 
+#### Example 4: SheepRL - Using a Manifest File
+This section shows how to submit a trained agent with SheepRL.
+
+<a href="https://github.com/diambra/agents/blob/main/sheeprl/agent-ppo.py" target="_blank">Here</a> you can find an example of what the evaluation script should look like.
+You need two files:
+- A YAML configuration file, the one produced during training, that contains the configs of the agent and all the information needed to instantiate the environment.
+- A `ckpt` file that contains the weights of the agent.
+
+After retrieving these two files, you can load them with the script file into your huggingface repository.
+An example of the files you need to retrieve is shown <a href="https://github.com/diambra/agents/blob/main/sheeprl/example-logs/runs/ppo/doapp/experiment" target="_blank">here</a>.
+
+Assuming you are using the `arena-sheeprl-on3.10-bullseye` dependencies image and that you upload the files without subdirectories, create a file named `submission-manifest.yaml` with the following content:
+
+```yaml
+mode: AIvsCOM
+image: diambra/arena-sheeprl-on3.10-bullseye:main
+command:
+  - python
+  - "/sources/agent-ppo.py"
+  - "--cfg_path"
+  - "/sources/results/ppo/config.yaml"
+  - "--checkpoint_path"
+  - "/sources/results/ppo/ckpt_1024_0.ckpt"
+sources:
+  .: git+https://username:{{.Secrets.hf_token}}@huggingface.co/username/repository_name.git#ref=branch_name
+```
+
+{{% notice note %}}
+<a href="https://huggingface.co/michele-milesi/diambra-agent-example/tree/main" target="_blank">Here</a> you can find the huggingface repository on which the example is based.
+{{% /notice %}}
+
+Replace `username` and `repository_name.git#ref=branch_name` with the appropriate values, and change `image` and `command` fields according to your specific use case.
+
+Then, submit your agent using the manifest file:
+
+```sh
+diambra agent submit --submission.secrets-from=huggingface --submission.manifest submission-manifest.yaml
+```
+
+This will automatically retrieve the Hugging Face token you saved earlier.
+
 ### GitHub
 
 These are the steps to submit your own agent hosted on GitHub: