Help for install command

Author: Fatme Havaluova

docs/man_pages/project/creation/install.md

@@ -0,0 +1,15 @@
+install
+==========
+
+Usage | Synopsis
+---|---
+General | `$ tns install [<Path To Package.json File>] [--path] [--copy-from]`
+
+Creates and prepares a NativeScript project from the specified package.json file using the default template or from an existing NativeScript project.
+
+### Options
+* `--path` - Specifies the directory where you want to create the project, if different from the current directory. The directory must be empty.
+* `--copy-from` - Specifies a directory which contains an existing NativeScript project. If not set, the NativeScript CLI creates the project from the default hello-world template.
+
+### Attributes
+* `<Path To Package.json File>` is the path to package.json file or directory that contains package.json file. <% if(isConsole) { %>For more information about the `package.json` specification, see https://github.com/NativeScript/nativescript-cli/blob/master/PLUGINS.md#packagejson-specification<% } %>. If the path to package.json file is not specified, NativeScript CLI searches for package.json in current directory.