Reduce the prod image size by 83%

.dockerignore

@@ -92,7 +92,7 @@ venv/
 */*/*.swp
 */*/*/*.swp
 
-# Django stuff:
+# Django stuff
 *.log
 local_settings.py
 db.sqlite3

Dockerfile

@@ -1,26 +1,26 @@
+# Start with a python 3 base image
 ARG PYTHON_VERSION=3-alpine
-
 FROM python:${PYTHON_VERSION}
 
-RUN \
-    apk add --no-cache postgresql-libs && \
-    apk add --no-cache --virtual .build-deps gcc musl-dev postgresql-dev
-
-RUN mkdir -p /app
 WORKDIR /app
-
 COPY requirements.txt .
-RUN pip install -r requirements.txt
-RUN apk --purge del .build-deps
+
+# Install dependencies
+RUN \
+    apk add --no-cache postgresql-libs && \
+    apk add --no-cache --virtual .build-deps gcc musl-dev postgresql-dev && \
+    pip install -r requirements.txt --no-cache-dir && \
+    apk --purge del .build-deps
 
 COPY . .
 ENV SECRET_KEY=$SECRET_KEY FMP_API_KEY=$FMP_API_KEY
 
+# Initialize the Postgres database, load the flashcards data, and collect all static files
 RUN \
     python stockhelper/manage.py migrate && \
     python stockhelper/manage.py loaddata cards.json && \
     python stockhelper/manage.py collectstatic --noinput
 
+# Start an HTTP server
 EXPOSE 8080
-
 CMD ["gunicorn", "--bind", ":8080", "--workers", "2", "--chdir", "stockhelper", "stockhelper.wsgi"]

Dockerfile.dev

@@ -18,7 +18,3 @@ RUN \
 
 COPY . /code
 WORKDIR /code/stockhelper
-# Initialize the SQLite databases
-RUN python manage.py migrate
-# Load the flashcards data
-RUN python manage.py loaddata cards.json

docker-compose.yml

@@ -6,6 +6,7 @@ services:
     build:
       context: .
       dockerfile: Dockerfile.dev
+    # Initialize the SQLite database, load the flashcards data, and start the server
     command: >
       sh -c "python manage.py migrate &&
              python manage.py loaddata cards.json &&