Update README.md

README.md

@@ -1,16 +1,31 @@
 # Facebook Group Posts Scraper 
-​​
+
 Facebook Group Posts Scraper is a package which is used for scraping facebook group posts by their group ids.
-​
+
 ## Getting Started - Installation
-​
-`npm i facebook-group-posts-scraper -g --unsafe-perm`
-​
+
+```sh
+npm i facebook-group-posts-scraper -g --unsafe-perm
+fgps init
+```
 ## Usage
+
+To scrape posts from group accessible by URL facebook.com/groups/some_group/:
+
+```sh
+fgps --group-ids some_group --output /some/output/dir
+```
+
+For many groups at once:
+```sh
+fgps --group-ids some_group1,some_group2,some_group3 --output /some/output/dir
+```
+
+## Command-line options
 
-- `fgps -h/--help`     - Shows the help page.
-- `fgps -v/--version`  - Shows the CLI version.
-- `fgps  --output`     - Specify the output folder destination.
-- `fgps  --headful`    - Disable headless mode.
-- `fgps  init`         - Initialize user configuration.
-- `fgps  --group-ids`  - Indicates which groups ids that we want to scrape (seperated by commas).
+- `fgps -h/--help`    - Shows the help page.
+- `fgps -v/--version` - Shows the CLI version.
+- `fgps --output`     - Specify the output folder destination.
+- `fgps --headful`    - Disable headless mode.
+- `fgps init`         - Initialize user configuration.
+- `fgps --group-ids`  - Indicates which groups ids that we want to scrape (seperated by commas).