docs: Add CLI docs (#5879)

docs/cli/coder_server_postgres-builtin-serve.md

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+## coder server postgres-builtin-serve
+
+Run the built-in PostgreSQL deployment.
+
+```
+coder server postgres-builtin-serve [flags]
+```
+
+### Options
+
+```
+  -h, --help      help for postgres-builtin-serve
+      --raw-url   Output the raw connection URL instead of a psql command.
+```
+
+### Options inherited from parent commands
+
+```
+      --global-config coder   Path to the global coder config directory.
+                              Consumes $CODER_CONFIG_DIR (default "~/.config/coderv2")
+      --header stringArray    HTTP headers added to all requests. Provide as "Key=Value".
+                              Consumes $CODER_HEADER
+      --no-feature-warning    Suppress warnings about unlicensed features.
+                              Consumes $CODER_NO_FEATURE_WARNING
+      --no-version-warning    Suppress warning when client and server versions do not match.
+                              Consumes $CODER_NO_VERSION_WARNING
+      --token string          Specify an authentication token. For security reasons setting CODER_SESSION_TOKEN is preferred.
+                              Consumes $CODER_SESSION_TOKEN
+      --url string            URL to a deployment.
+                              Consumes $CODER_URL
+  -v, --verbose               Enable verbose output.
+                              Consumes $CODER_VERBOSE
+```
+
+### SEE ALSO
+
+- [coder server](coder_server.md) - Start a Coder server
+
+###### Auto generated by spf13/cobra on 27-Jan-2023