fix(docs): add periods to numbered list

Author: thebengeu

README.md

@@ -92,9 +92,9 @@ None. Please don't use this as a standalone server. This should be used behind a
 
 ## Developers
 
-1. Start the database using `docker-compose -f test/db/docker-compose.yml up`
-2. Run `npm run dev`
-3. Run `npm test` while you work
+1. Start the database using `docker-compose -f test/db/docker-compose.yml up`.
+2. Run `npm run dev`.
+3. Run `npm test` while you work.
 
 ## Licence