Add docker support;

Author: arkanister

.dockerignore

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+**/node_modules/

docker-compose.yml

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+version: '3.4'
+services:
+  backend:
+    build:
+      context: .
+      dockerfile: ./dockerfiles/backend/Dockerfile
+    env_file: frontend/.env
+    ports:
+      - '5000:5000'
+    healthcheck:
+      test: ["CMD", "curl", "-f", "http://localhost:5000/healthy"]
+      interval: 1s
+      timeout: 3s
+      retries: 10
+  frontend:
+    build:
+      context: .
+      dockerfile: ./dockerfiles/frontend/Dockerfile
+    env_file: backend/.env
+    ports:
+      - '8080:8080'
+    depends_on:
+      - backend
+    healthcheck:
+      test: ["CMD", "curl", "-f", "http://localhost:8080/"]
+      interval: 1s
+      timeout: 3s
+      retries: 10

dockerfiles/backend/Dockerfile

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+FROM python:3.9-slim
+ENV PYTHONUNBUFFERED 1
+
+MAINTAINER arkanister "[email protected]"
+
+WORKDIR /app
+
+COPY backend/src/ .
+
+ADD ./backend/requirements.pip /
+ADD ./dockerfiles/backend/gunicorn.py /
+
+# required for healthy check
+RUN apt update && apt install curl -y
+
+# install requirements
+RUN pip install gunicorn==20.0 && \
+    pip install -r /requirements.pip
+
+ENTRYPOINT ["gunicorn", "-c", "/gunicorn.py", "wsgi:application"]
+EXPOSE 5000

dockerfiles/backend/gunicorn.py

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+"""
+Application Configuration File
+https://docs.gunicorn.org/en/stable/settings.html#settings
+"""
+import os
+import multiprocessing
+
+
+# Chdir to specified directory before apps loading.
+# https://docs.gunicorn.org/en/stable/settings.html#chdir
+chdir = '/app/'
+
+# Bind the application on localhost both on ipv6 and ipv4 interfaces.
+# https://docs.gunicorn.org/en/stable/settings.html#bind
+bind = '0.0.0.0:5000'
+
+
+####################
+# Worker Processes #
+####################
+
+# The number of worker processes for handling requests.
+# https://docs.gunicorn.org/en/stable/settings.html#workers
+workers = multiprocessing.cpu_count() * 2 + 1
+
+# The number of worker threads for handling requests.
+# https://docs.gunicorn.org/en/stable/settings.html#threads
+threads = 2 * multiprocessing.cpu_count()
+
+# The maximum number of requests a worker will process before restarting.
+# https://docs.gunicorn.org/en/stable/settings.html#max-requests
+max_requests = os.getenv('GUNICORN_WORKER_MAX_REQUESTS', default=2400)
+
+# The maximum jitter to add to the max_requests setting.
+# https://docs.gunicorn.org/en/stable/settings.html#max-requests-jitter
+max_requests_jitter = os.getenv('GUNICORN_WORKER_MAX_REQUESTS_JITTER', default=50)
+
+# Workers silent for more than this many seconds are killed and restarted.
+# https://docs.gunicorn.org/en/stable/settings.html#timeout
+timeout = os.getenv('GUNICORN_WORKER_TIMEOUT', default=30)

dockerfiles/frontend/Dockerfile

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+FROM node:lts-alpine
+
+MAINTAINER arkanister "[email protected]"
+
+# install simple http server for serving static content
+RUN npm install -g http-server
+
+WORKDIR /app
+
+# copy both 'package.json' and 'package-lock.json' (if available)
+COPY frontend/ .
+
+# install project dependencies
+RUN npm install
+
+# build app for production with minification
+RUN npm run build
+
+ENTRYPOINT ["http-server", "dist"]
+EXPOSE 8080