Dockerize application

Dockerfile

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+# pull official base image
+FROM python:3.9.6-alpine
+
+# set work directory
+WORKDIR /usr/src/app
+
+# set environment variables
+ENV PYTHONDONTWRITEBYTECODE 1
+ENV PYTHONUNBUFFERED 1
+
+# install dependencies
+RUN pip install --upgrade pip
+COPY ./requirements.txt .
+RUN pip install -r requirements.txt
+
+# copy project
+COPY . .

docker-compose.yml

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+version: '3.8'
+
+services:
+  web:
+    build: .
+    command: python main.py
+    volumes:
+      - mailsend_server:/usr/src/app/
+    ports:
+      - 8081:8081
+    env_file:
+      - ./config.ini
+
+volumes:
+  mailsend_server: