update documentation

README.md

@@ -1,19 +1,41 @@
 # Facebook event scraper
 
-A simple facebook event scraper written with puppeteer
+A simple facebook event scraper written with node using puppeteer.
 
 ## Introduction
 
-Please note that terms and condition apply from facebook and this should only be
-used if written consent is provided by facebook. However it will work without.
+Please note that terms and conditions apply from Facebook and this script should
+only be used if written consent is provided by Facebook.
+
+## Dependencies for local install
+
+```sh
+bash
+node > v10
+yarn > # tested with 1.22
+```
 
 ## Usage
 
+```sh
+./scrape.sh --help
+```
+
+## Examples
+
+```sh
+./scrape.sh --event 2469238006641468
+./scrape.sh --page PlanetRammstein
+./scrape.sh --pages PlanetRammstein bandmaldio
+```
+
 ### Alpine docker image is provided
 
 ```sh
+rm -rf node_modules # If switching from a local install
 docker build --tag facebook-scraper .
 docker run \
+    --rm \
     -v "$(pwd):/app" \
     --cap-add SYS_ADMIN \
     facebook-scraper