Containerize backend

Dockerfile

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+FROM python:3.10 as base
+
+FROM base as builder
+
+RUN apt-get update && apt-get install -y \
+    build-essential \
+    libpq-dev \
+    python3-dev
+
+WORKDIR /install
+
+COPY pyproject.toml  pdm.lock ./
+
+RUN pip install --no-cache-dir --upgrade pip \
+    && pip install --no-cache-dir pdm==2.4.8 \
+    && pdm config python.use_venv false
+RUN pdm install --prod --no-editable
+
+FROM base
+WORKDIR /usr/src/app
+
+ENV PATH="/usr/src/python/bin:$PATH" \
+    PYTHONPATH="/usr/src/python/lib"
+
+COPY --from=builder \
+    /install/__pypackages__/3.10 \
+    /usr/src/python
+
+COPY backend backend/
+COPY migrations migrations/
+COPY wsgi.py ./
+
+CMD ["gunicorn", "-c", "python:backend.gunicorn", "wsgi:app"]

backend/gunicorn.py

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+import os
+
+bind = "0.0.0.0:5000"
+worker_class = "gevent"
+workers = (os.cpu_count() or 1) * 2 + 1
+threads = (os.cpu_count() or 1) * 2 + 1
+preload = True
+timeout = 180

docker-compose.yml

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+version: "3.4"
+
+x-backend-config: &backend
+  image: localizer-backend:latest
+  volumes:
+    - .:/app
+  depends_on:
+    - db
+  env_file: ${ENV_FILE:-localizer.env}
+
+volumes:
+  db_data:
+
+services:
+  backend:
+    <<: *backend
+    container_name: localizer-backend
+    restart: always
+    ports:
+      - "5600:5000"
+
+  migration:
+    <<: *backend
+    container_name: localizer-migration
+    restart: on-failure
+    command: flask db upgrade
+
+  db:
+    image: mdillon/postgis:11
+    container_name: db
+    restart: always
+    env_file: ${ENV_FILE:-localizer.env}
+    ports:
+      - "5434:5432"
+    volumes:
+      - db_data:/var/lib/postgresql/data
+