Document Docker development (#21)

This also mounts the project root at /takahe/ to make development possible.

.gitignore

@@ -5,3 +5,5 @@
 /docs/_build
 /media/
 notes.md
+__pycache__/
+*.pyc

CONTRIBUTING.md

@@ -2,33 +2,63 @@
 
 ## Getting Started
 
-Takahē requires Python 3.11
+Development can be done "bare metal" or with Docker.  We'll describe both here.
 
-Create and activate a virtual environment
 
-```
-python3 -m venv .venv
-. .venv/bin/activate
+### Bare Metal
+
+Takahē requires Python 3.11, so you'll need that first.  Then, create and
+activate a virtual environment:
+
+```shell
+$ python3 -m venv .venv
+$ . .venv/bin/activate
 ```
 
-Install the development requirements:
+You can install the development requirements:
 
-```
-pip install -r requirements-dev.txt
+```shell
+$ pip install -r requirements-dev.txt
 ```
 
-Enable git commit hooks:
+...and enable git commit hooks if you like:
 
 ```bash
-pre-commit install
+$ pre-commit install
 ```
 
-Try running the tests:
+Finally, you can run the tests with PyTest:
 
 ```bash
-pytest
+$ pytest
 ```
 
+
+### Docker
+
+The docker build process will take care of much of the above, but you just have
+to be sure that you're executing it from the project root.
+
+First, you need to build your image:
+
+```shell
+$ docker build -f ./docker/Dockerfile -t "takahe:latest" .
+```
+
+Then start the `compose` session:
+
+```shell
+$ docker compose -f docker/docker-compose.yml up
+```
+
+Once your session is up and running, you can run the tests inside your
+container:
+
+```shell
+$ docker compose -f docker/docker-compose.yml exec web pytest
+```
+
+
 # Code of Conduct
 
 As a contributor, you can help us keep the Takahē community open and inclusive. Takahē

docker/docker-compose.yml

@@ -37,6 +37,8 @@ services:
       - db
     ports:
       - "8000:8000"
+    volumes:
+      - ../:/takahe/
 
 networks:
   internal_network: