Update README.md

Author: kilna

README.md

@@ -14,22 +14,22 @@ takes a JSON input file like event.json and returns an ASCII-art version of the
 $ cd example/
 ```
 
-The Dockerfile in the example directory loads the current workspace into the image and installs
-dependencies from the requirements.txt file:
+The `Dockerfile` in the example directory loads the current workspace into the image and installs
+dependencies from the `requirements.txt` file:
 
 ```
 FROM kilna/alpine-aws-python-lambda
 COPY . /workspace
 RUN pip install -r requirements.txt
 ```
 
-To build a docker image called 'example-lambda-image' with the lambda function in it, run:
+To build a docker image called `example-lambda-image` with the lambda function in it, run:
 
 ```
 $ docker build --tag example-lambda-image .
 ```
 
-If you want to execute the lambda function against an event.json input file:
+If you want to execute the lambda function against the `event.json` input file:
 
 ```
 $ docker run example-lambda-image lambda invoke