flyctl: add page (#8144)

pages/common/flyctl.md

@@ -0,0 +1,36 @@
+# flyctl
+
+> Command-line tool for flyctl.io.
+> More information: <https://github.com/superfly/flyctl>.
+
+- Sign into a Fly account:
+
+`flyctl auth login`
+
+- Launch an application from a specific Dockerfile (the default path is the current working directory):
+
+`flyctl launch --dockerfile {{path/to/dockerfile}}`
+
+- Open the current deployed application in the default web browser:
+
+`flyctl open`
+
+- Deploy the Fly applications from a specific Dockerfile:
+
+`flyctl deploy --dockerfile {{path/to/dockerfile}}`
+
+- Open the Fly Web UI for the current application in a web browser:
+
+`flyctl dashboard`
+
+- List all applications in the logged-in Fly account:
+
+`flyctl apps list`
+
+- View the status of a specific running application:
+
+`flyctl status --app {{app_name}}`
+
+- Show version information:
+
+`flyctl version`