Add docker-compose.yml to simplify local doc development

docker-compose.yml

@@ -0,0 +1,11 @@
+version: "3.7"
+
+services:
+  docs:
+    image: python:3.6
+    command: sh -c "pip install -r requirements.txt && mkdocs serve -a 0.0.0.0:8000"
+    working_dir: /docs
+    volumes:
+      - ./:/docs
+    ports:
+      - 8000:8000

docs/contributing_docs.md

@@ -9,7 +9,11 @@ We publish our documentation using Netlify.
 
 ## Previewing rendered content
 
-### Previewing docs locally
+### Using Docker locally
+
+The root of the project contains a `docker-compose.yml` file. Simply run `docker-compose up` and then access the docs at [http://localhost:8000](http://localhost:8000).
+
+### Using Python locally
 
 * Ensure that you have Python 3.6.0 or higher.
 * Set up a virtualenv and run `pip install -r requirements.txt` in the `testcontainers-java` root directory.