build(docker): describe development stack

Dockerfile

+# syntax=docker/dockerfile:1
+FROM python:3.8
+
+WORKDIR /app
+
+COPY requirements.txt .
+RUN pip install -r requirements.txt
+
+CMD ["python", "main.py"]

docker-compose.yml

+---
+version: '3.4'
+
+services:
+  repdav:
+    image: repdav:latest
+    build:
+      context: .
+    ports:
+      - ${port:-8080}:${port:-8080}
+    environment:
+      host: ${host:-0.0.0.0}
+      port: ${port:-8080}
+      tg_auth_wsdl: "https://textgridlab.org/1.0/tgauth/wsdl/tgextra.wsdl"
+      tg_auth_address: "https://textgridlab.org/1.0/tgauth/tgextra.php"
+    volumes:
+      - $PWD/src:/app