Introduced docker

Dockerfile

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+FROM node:current-alpine
+COPY . /app/
+WORKDIR /app
+ENV NODE_ENV=production
+RUN yarn install && yarn build && rm -rf node_modules
+
+
+FROM python:3-slim-buster
+
+ENV PYTHONDONTWRITEBYTECODE 1
+ENV PYTHONUNBUFFERED 1
+ENV DATABASE_URL sqlite:////data/app.db
+ENV FLASK_APP app
+ENV FLASK_DEBUG 0
+COPY ./requirements.txt /requirements.txt
+RUN apt-get update && \
+    apt-get install -y gosu && \
+    rm -rf /var/lib/apt/lists/* && \
+    pip install -r /requirements.txt && pip install gunicorn
+COPY --from=0 /app/ /app
+WORKDIR /app
+RUN flask digest compile
+ENTRYPOINT ["/app/entrypoint.sh"]
+CMD ["gunicorn", "--bind", "0.0.0.0:5000", "main:app"]

entrypoint.sh

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+#!/bin/bash
+chown -R www-data:www-data /data
+flask db upgrade && gosu www-data "$@"

requirements.txt

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+appdirs==1.4.3
+CacheControl==0.12.6
+certifi==2019.11.28
+chardet==3.0.4
+click==7.1.2
+colorama==0.4.3
+contextlib2==0.6.0
+distlib==0.3.0
+distro==1.4.0
+Flask==1.1.2
+Flask-SQLAlchemy==2.4.4
+Flask-WTF==0.14.3
+gunicorn==20.0.4
+html5lib==1.0.1
+idna==2.8
+ipaddr==2.2.0
+itsdangerous==1.1.0
+Jinja2==2.11.2
+lockfile==0.12.2
+MarkupSafe==1.1.1
+msgpack==0.6.2
+packaging==20.3
+pep517==0.8.2
+progress==1.5
+pyparsing==2.4.6
+pytoml==0.1.21
+requests==2.22.0
+retrying==1.3.3
+six==1.14.0
+SQLAlchemy==1.3.19
+urllib3==1.25.8
+webencodings==0.5.1
+Werkzeug==1.0.1
+WTForms==2.3.3