Add documentation for initializing an empty Deno project (#2807)

Author: GroophyLifefor

runtime/reference/cli/init.md

@@ -145,6 +145,46 @@ Watcher Process started.
 deno serve: Listening on http://0.0.0.0:8000/
 ```
 
+## Initialize an empty project
+
+Running `deno init --empty` bootstraps an empty project with a basic console
+log.
+
+```sh
+$ deno init --empty
+✅ Project initialized
+
+Run these commands to get started
+
+  # Run the program
+  deno run main.ts
+
+  # Run the program and watch for file changes
+  deno task dev
+```
+
+Your [`deno.json`](/runtime/fundamentals/configuration/) file will look like
+this:
+
+```json
+{
+  "tasks": {
+    "dev": "deno run --watch main.ts"
+  }
+}
+```
+
+Now, you can run the project, which
+[watches for changes](/runtime/getting_started/command_line_interface/#watch-mode),
+by running `deno task dev`.
+
+```sh
+$ deno task dev
+Task dev deno run --watch main.ts
+Watcher Process started.
+Hello world!
+```
+
 ## Generate a library project
 
 You can append a `--lib` flag to add extra parameters to your `deno.json`, such