added better readme

README.md

@@ -10,10 +10,16 @@ There are couple of things you must ensure.
 The scraper was written to be batch inserted into Hasuragres. (Look at hasuragres / GraphQL API).
 The course data is scraped from the UNSW timetable website https://timetable.unsw.edu.au/year/.
 
+You need to fill out the relevant environment var details in a `.env` file. See the `.env.example` file for the format.
+
 If you run `cargo run -- help`, it will give a list of commands you can run.
+<br/>
+
+<ul>
+<li > scrape - Perform scraping. Creates a json file to store the data.</ li> 
+<li > scrape_n_batch_insert - Perform scraping and batch insert. Does not create a json file to store the data.
+<li> batch_insert - Perform batch insert on json files created by scrape.</ li> 
+<li > help - Show this help message </ li> 
+</ ul>
 
-Usage:
-scrape - Perform scraping. Creates a json file to store the data.
-scrape_n_batch_insert - Perform scraping and batch insert. Does not create a json file to store the data.
-batch_insert - Perform batch insert on json files created by scrape.
-help - Show this help message
+Generally running a `scrape_n_batch_insert` is enough if you do not want a json file with everything written to disk (faster as well).