add README.md

Dockerfile

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+FROM python:3.11-slim-bullseye
+
+WORKDIR /app
+
+RUN rm /etc/localtime
+RUN ln -s /usr/share/zoneinfo/Europe/Kyiv /etc/localtime
+
+COPY ./requirements.txt /app/requirements.txt
+
+RUN python -m pip install -r requirements.txt
+
+COPY ./app/ /app/app/
+
+CMD flask run -h 0.0.0.0 -p $PORT

README.md

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+# Application for Backend Development Course
+
+## How to deploy this application
+
+First, make sure you have both `docker` and `docker-compose` installed and working.
+You can then clone this repository and bring the server up with docker-compose any way you prefer.
+
+For example, your actions may look like so:
+```bash
+git clone http://139.162.162.130:3000/hasslesstech/backend-development-course
+cd backend-development-course
+docker-compose up
+```
+
+That should be enough to get the server up and running.

docker-compose.yaml

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+version: '3'
+
+services:
+  app:
+    restart: unless-stopped
+    build:
+      context: .
+      dockerfile: Dockerfile
+    environment:
+      PORT: "12402"
+    ports:
+      - "12402:12402"