Refactor django container build with poetry dependency management

django/Dockerfile

@@ -1,18 +1,25 @@
-# start from an official image
+# Download and install python dependencies in a container
+FROM python:3.9 as dependency-install-container
+ARG PROJECT_ENVIRONMENT
+COPY ./poetry.lock ./pyproject.toml ./django/install-packages.sh /code/
+WORKDIR /code
+RUN chmod u+x /code/install-packages.sh && \
+    /code/install-packages.sh $PROJECT_ENVIRONMENT
+
+# Copy our dependencies into the base image
 FROM python:3.9
+COPY --from=dependency-install-container /code/.venv /code/.venv
 
 ENV PYTHONDONTWRITEBYTECODE 1
 ENV PYTHONUNBUFFERED 1
 
 EXPOSE 8000
 
-WORKDIR /code/django/cantusdb_project
-
-COPY cantusdb_project/requirements.txt /code/django/cantusdb_project
-
-RUN pip3 install -r requirements.txt
+WORKDIR /code/cantusdb_project
 
-COPY cantusdb_project .
+# Add our python environment binaries and package files to the path
+ENV PATH="$PATH:/code/.venv/bin/" \
+    PYTHONPATH="$PYTHONPATH:/code/.venv/lib/python3.9/site-packages/"
 
 # define the default command to run when starting the container
-CMD ["gunicorn", "--chdir", "cantusdb", "--bind", ":8000", "cantusdb.wsgi:application", "--workers", "5"]
+CMD ["gunicorn", "--bind", ":8000", "cantusdb.wsgi:application", "--workers", "5"]

django/install-packages.sh

@@ -0,0 +1,14 @@
+#!/bin/bash
+
+pip install poetry==1.8.2
+
+poetry config virtualenvs.in-project true # Creates a virtualenv in the project directory
+poetry config virtualenvs.options.always-copy true # Ensures no symlinking in the virtualenv
+poetry config virtualenvs.options.no-pip true # Don't install pip in the virtualenv
+poetry config virtualenvs.options.no-setuptools true # Don't install setuptools in the virtualenv
+
+if [ $1 = "DEVELOPMENT" ]; then
+    poetry install --no-cache --with debug,test
+else
+    poetry install --no-cache
+fi 

docker-compose.yml

@@ -3,9 +3,10 @@ version: '3'
 services:
   django:
     build:
-      context: ./django
+      context: .
+      dockerfile: ./django/Dockerfile
     volumes:
-      - ./:/code/
+      - ./django/cantusdb_project:/code/cantusdb_project
       - static_volume:/resources/static
       - media_volume:/resources/media
       - api_cache_volume:/resources/api_cache