docs: add docs for --dev flag (#714)

* docs: add docs for --dev flag

* [pre-commit.ci] auto fixes from pre-commit.com hooks

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---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

docs_src/src/pages/documentation/api_reference/getting_started.mdx

@@ -80,7 +80,7 @@ Batman was curious about how to run the application. Robyn explained that he cou
 A robyn application exposes certain commands to the user. These commands can be used to run the application, or to generate a new project.
 
 ```bash
-usage: app.py [-h] [--processes PROCESSES] [--workers WORKERS] [--dev] [--log-level LOG_LEVEL] [--create] [--docs] [--open-browser] [--version]
+usage: app.py [-h] [--processes PROCESSES] [--workers WORKERS] [--log-level LOG_LEVEL] [--create] [--docs] [--open-browser] [--version]
 
 Robyn, a fast async web framework with a rust runtime.
 
@@ -89,7 +89,6 @@ options:
   --processes PROCESSES
                         Choose the number of processes. [Default: 1]
   --workers WORKERS     Choose the number of workers. [Default: 1]
-  --dev                 Development mode. It restarts the server based on file changes.
   --log-level LOG_LEVEL
                         Set the log level name
   --open-browser        Open the browser on successful start.
@@ -98,7 +97,33 @@ options:
   --create              Create a new project template.
   --docs                Open the Robyn documentation.
   --version             Show the Robyn version.
+  --dev                 Development mode. It restarts the server based on file changes.
+
+```
+
+Or the application can be run using Robyn's CLI, i.e. using `python -m robyn app.py`
+
+```bash
 
+usage: python -m robyn app.py [-h] [--processes PROCESSES] [--workers WORKERS] [--dev] [--log-level LOG_LEVEL] [--create] [--docs] [--open-browser] [--version]
+
+
+Robyn, a fast async web framework with a rust runtime.
+
+options:
+  -h, --help            show this help message and exit
+  --processes PROCESSES
+                        Choose the number of processes. [Default: 1]
+  --workers WORKERS     Choose the number of workers. [Default: 1]
+  --log-level LOG_LEVEL
+                        Set the log level name
+  --open-browser        Open the browser on successful start.
+
+  Module flags
+  --create              Create a new project template.
+  --docs                Open the Robyn documentation.
+  --version             Show the Robyn version.
+  --dev                 Development mode. It restarts the server based on file changes.
 ```
 
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