Fix: update README to indicate you should set random AWS keys in deve…

…lopment

The values are not relevant, as the local dynamodb will completely
ignore it. But they do need to be set before the code actually
works.

README.md

@@ -56,7 +56,7 @@ This will start an empty AWS DynamoDB server on port 8000.
 You can start the `master_server` by running:
 
 ```bash
-.env/bin/python -m master_server --app master_server --web-port 8081 --db dynamodb --dynamodb-host http://127.0.0.1:8000
+AWS_ACCESS_KEY_ID=1 AWS_SECRET_ACCESS_KEY=1 .env/bin/python -m master_server --app master_server --web-port 8081 --db dynamodb --dynamodb-host http://127.0.0.1:8000
 ```
 
 This will start the server on port 3978 (default) for you to work with locally.
@@ -68,7 +68,7 @@ You can change your `/etc/hosts` or `C:\Windows\System32\drivers\etc` to map `ma
 You can start the `web_api` by running:
 
 ```bash
-.env/bin/python -m master_server --app web_api --web-port 8080 --db dynamodb --dynamodb-host http://127.0.0.1:8000
+AWS_ACCESS_KEY_ID=1 AWS_SECRET_ACCESS_KEY=1 .env/bin/python -m master_server --app web_api --web-port 8080 --db dynamodb --dynamodb-host http://127.0.0.1:8000
 ```
 
 This will start the HTTP server on port 8080 for you to work with locally.