Brief explanation of .env

Author: NitroGuy10

README.md

@@ -2,3 +2,12 @@
 A spiritual successor to [HELPq](https://github.com/ehzhang/HELPq)
 
 Check out the frontend [here](https://github.com/tamuhack-org/helpr-frontend)
+
+## .env
+
+You'll need to create a file called .env in the root directory of this repo. All it needs to have is your PostgreSQL database url like the following:
+
+```toml
+DATABASE_URL="postgres://_____:_____@_____:_____/_____"
+```
+