Add support for alternate base url (#15)

Support the usage of an alternate base url when calling the API

.github/workflows/linting.yml

@@ -1,10 +1,12 @@
-name: Pylint
+name: Linting
 
 on:
   push:
+    branches:
+      - main
   pull_request:
     branches:
-      - master
+      - main
 
 jobs:
   build:

README.md

@@ -45,9 +45,32 @@ It is based on the [customerinsights](https://pypi.org/project/customerinsights)
         segments    : Commands to manage segments.
     ```
 
+1. Get help on any command with `--help`:
+
+    ```bash
+    > aui-cli instances list --help
+
+    Command
+        aui-cli instances list : Lists all instances.
+
+    Arguments
+
+    Global Arguments
+        --debug            : Increase logging verbosity to show all debug logs.
+        --help -h          : Show this help message and exit.
+        --only-show-errors : Only show errors, suppressing warnings.
+        --output -o        : Output format.  Allowed values: json, jsonc, none, table, tsv, yaml, yamlc.
+                            Default: json.
+        --query            : JMESPath query string. See http://jmespath.org/ for more information and
+                            examples.
+        --verbose          : Increase logging verbosity. Use --debug for full debug logs.
+    ```
+
 ## Configuration
 
-Add the `api_key` and OAuth token in the file `~/.aui-cli/config`
+All configuration values are stored in the file `~/.aui-cli/config`, automatically created the first time the application is run.
+
+In the `[autentication]` section, add your `api_key` and OAuth token:
 
 ```text
 [authentication]
@@ -55,6 +78,13 @@ api_key = REDACTED
 token = REDACTED
 ```
 
+An alternate base url (default is `https://api.ci.ai.dynamics.com/v1`) can be defined in the `[endpoint]` section:
+
+```text
+[endpoint]
+base_url = https://api.ci.ai.dynamics-alternate.com/v1
+```
+
 ## Contributing
 
 This project welcomes contributions and suggestions. Most contributions require you to agree to a Contributor License Agreement (CLA) declaring that you have the right to, and actually do, grant us the rights to use your contribution. For details, visit [https://cla.microsoft.com](https://cla.microsoft.com).

src/aui_cli/common/services.py

@@ -4,15 +4,21 @@
 # --------------------------------------------------------------------------------------------
 
 from dynamics.customerinsights.api import CustomerInsights
+from knack.log import get_logger
 from .config import GLOBAL_CONFIG
 
+logger = get_logger(__name__)
+
 
 def get_client():
     """
     Returns an authenticated CustomerInsights client.
     """
 
-    return CustomerInsights()
+    base_url = GLOBAL_CONFIG.get("endpoint", "base_url", None)
+    if base_url:
+        logger.info('Using base url: %s', base_url)
+    return CustomerInsights(base_url)
 
 
 def get_custom_headers():