Deploying the Airbyte Module using Helm

From the helm directory of the Airbyte Module, run:
```
helm install airbyte-module -f abm/values.sample.yaml abm -n default
```
This command deploys an airbyte-module pod in the default namespace, and creates an 'airbyte-module' service.
To test it, go to the client directory, and run:
```
./deploy_airbyte_module_client_pod.sh
```
Now that the client pod is deployed, you can obtain the letter_frequency dataset from the airbyte-module server by running:
```
kubectl exec -it my-shell -n default -- /root/do_get.sh
```
The 'letter_frequency' dataset is a CSV file found in https://people.sc.fsu.edu/~jburkardt/data/csv/letter_frequency.csv. It contains a table with the frequency of each of the 26 English letters. The helm configuration in abm/values.sample.yaml contains the URL for the dataset, as well the name of the docker image used as a connector to obtain this dataset (airbyte/source-file).

Alternatively, you can obtain the same dataset through a REST GET request. This can be done by using the 'curl' utility. First you need to install it. Simply run the following commands:
```
kubectl exec -it my-shell -n default -- apt-get install -y curl
kubectl exec -it my-shell -n default -- curl my-app-fybrik-airbyte-sample-airbyte-module.fybrik-blueprints:79/fybrik-airbyte-sample/letter-frequency
```

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