Update Dockerfile, expose port 8001 and update cmd line 63

Dockerfile

@@ -1,31 +1,65 @@
-FROM python:3.9.10-alpine3.11 as base
+FROM python:3.9.10-slim-buster
 
-ENV PYTHONFAULTHANDLER=1 \
-    PYTHONHASHSEED=random \
-    PYTHONUNBUFFERED=1
+    # python
+ENV PYTHONUNBUFFERED=1 \
+    # prevents python creating .pyc files
+    PYTHONDONTWRITEBYTECODE=1 \
+    \
+    # pip
+    PIP_NO_CACHE_DIR=off \
+    PIP_DISABLE_PIP_VERSION_CHECK=on \
+    PIP_DEFAULT_TIMEOUT=100 \
+    \
+    # poetry
+    # https://python-poetry.org/docs/configuration/#using-environment-variables
+    POETRY_VERSION=1.1.12 \
+    # make poetry install to this location
+    POETRY_HOME="/opt/poetry" \
+    # make poetry create the virtual environment in the project's root
+    # it gets named `.venv`
+    POETRY_VIRTUALENVS_IN_PROJECT=true \
+    # do not ask any interactive question
+    POETRY_NO_INTERACTION=1 \
+    \
+    # paths
+    # this is where our requirements + virtual environment will live
+    PYSETUP_PATH="/opt/pysetup" \
+    VENV_PATH="/opt/pysetup/.venv"
 
-WORKDIR /app
 
-FROM base as builder
+# prepend poetry and venv to path
+ENV PATH="$POETRY_HOME/bin:$VENV_PATH/bin:$PATH"
+
+
+# `builder-base` stage is used to build deps + create our virtual environment
+RUN apt-get update \
+    && apt-get install --no-install-recommends -y \
+        # deps for installing poetry
+        curl \
+        # deps for building python deps
+        build-essential
+
+# install poetry - respects $POETRY_VERSION & $POETRY_HOME
+RUN curl -sSL https://raw.githubusercontent.com/sdispater/poetry/master/get-poetry.py | python
 
-ENV PIP_DEFAULT_TIMEOUT=100 \
-    PIP_DISABLE_PIP_VERSION_CHECK=1 \
-    PIP_NO_CACHE_DIR=1 \
-    POETRY_VERSION=1.0.5
+# copy project requirement files here to ensure they will be cached.
+WORKDIR $PYSETUP_PATH
+COPY poetry.lock pyproject.toml ./
 
-RUN apk add --no-cache gcc libffi-dev musl-dev postgresql-dev
-RUN pip install "poetry==$POETRY_VERSION"
-RUN python -m venv /venv
+# install runtime deps - uses $POETRY_VIRTUALENVS_IN_PROJECT internally
+RUN poetry install --no-dev
 
-COPY pyproject.toml poetry.lock ./
-RUN poetry export -f requirements.txt | /venv/bin/pip install -r /dev/stdin
+WORKDIR $PYSETUP_PATH
+
+# quicker install as runtime deps are already installed
+RUN poetry install
+
+# will become mountpoint of our code
+WORKDIR /app
+ENV FLASK_APP spacepy/main.py
 
 COPY . .
-RUN poetry build && /venv/bin/pip install dist/*.whl
 
-FROM base as final
+EXPOSE 8001
 
-RUN apk add --no-cache libffi libpq
-COPY --from=builder /venv /venv
-COPY docker-entrypoint.sh wsgi.py ./
-CMD ["./docker-entrypoint.sh"]
+CMD ["gunicorn", "-b", "0.0.0.0:8001", "spacepy.wsgi:create_app()"]

spacepy/main.py

@@ -1,4 +1,5 @@
 
+#!/usr/bin/env python3
 from flask import Flask, jsonify
 from flask import Response
 
@@ -8,11 +9,11 @@
 from .blueprint.space_flight_v1 import resources
 from .insert_data import initialize_database
 
-def create_app():
-
 #----------------------------------------------------------------------------#
 # Initialize app and set config
 
+def create_app():
+
     app = Flask(__name__)
 
     app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
@@ -22,9 +23,8 @@ def create_app():
     doc_swagger.init_app(app)
 
 
-    #----------------------------------------------------------------------------#
-    # Routes Main
-
+#----------------------------------------------------------------------------#
+# Routes Main
 
     @app.route('/', methods=['GET'])
     def index():
@@ -40,9 +40,9 @@ def init():
 
         return jsonify(result)
 
+    return app
 
-    if __name__ == '__main__':
-        app.run(debug=True)
-
+#----------------------------------------------------------------------------#
 
-    return app
+if __name__ == '__main__':
+    create_app.run()

spacepy/wsgi.py

@@ -1,4 +1,4 @@
-from spacepy.main import app
+from spacepy.main import create_app
 
 if __name__ == "__main__":
-    app.run()
+    create_app.run()