docs: add docs page for CLI

docs/index.rst

@@ -147,6 +147,7 @@ Technical references for PostgREST's functionality.
 
    references/auth.rst
    references/api.rst
+   references/cli.rst
    references/transactions.rst
    references/connection_pool.rst
    references/schema_cache.rst

docs/postgrest.dict

@@ -15,6 +15,7 @@ Cardano
 casted
 cd
 centric
+CLI
 coercible
 conf
 Cloudflare

docs/references/cli.rst

@@ -0,0 +1,46 @@
+.. _cli:
+
+CLI
+===
+
+PostgREST provides a CLI to start and run your postgrest service. The CLI provides the commands listed below:
+
+.. _cli_commands:
+
+CLI Commands
+------------
+
+Help and Version
+~~~~~~~~~~~~~~~~
+
+.. code:: bash
+
+  $ postgrest [-h|--help]
+  $ postgrest [-v|--version]
+
+Example Config
+~~~~~~~~~~~~~~
+
+.. code:: bash
+
+  $ postgrest [-e|--example]
+
+These commands show the example configuration file.
+
+Config
+~~~~~~
+
+.. code:: bash
+
+  $ postgrest [--dump-config] [FILENAME]
+
+Here ``FILENAME`` is the path to configuration file.
+
+Schema Cache
+~~~~~~~~~~~~
+
+.. code:: bash
+
+  $ postgrest [--dump-schema] [FILENAME]
+
+Here ``FILENAME`` is the path to configuration file.