build: add Python dependencies and Docker setup

Dockerfile

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+FROM python:3.12-slim
+
+WORKDIR /app
+
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    gcc libpq-dev \
+    && rm -rf /var/lib/apt/lists/*
+
+COPY requirements.txt .
+RUN pip install uv && uv pip install --system -r requirements.txt
+
+COPY . .
+
+RUN mkdir -p /app/media /app/static
+
+EXPOSE 8000
+
+CMD ["sh", "-c", "python manage.py makemigrations chat && python manage.py migrate --noinput && python manage.py init_admin && python manage.py collectstatic --noinput && daphne -b 0.0.0.0 -p 8000 core.asgi:application"]

docker-compose.yml

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+
+services:
+  db:
+    image: postgres:15-alpine
+    environment:
+      POSTGRES_DB: discord_db
+      POSTGRES_USER: discord_user
+      POSTGRES_PASSWORD: discord_pass
+    volumes:
+      - pgdata:/var/lib/postgresql/data
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U discord_user -d discord_db"]
+      interval: 5s
+      timeout: 5s
+      retries: 5
+
+  web:
+    build: .
+    ports:
+      - "8000:8000"
+    environment:
+      SECRET_KEY: "poc-secret-key-not-for-production"
+      DEBUG: "True"
+      DB_NAME: discord_db
+      DB_USER: discord_user
+      DB_PASSWORD: discord_pass
+      DB_HOST: db
+      DB_PORT: "5432"
+    volumes:
+      - ./media:/app/media
+      - ./static:/app/static
+    depends_on:
+      db:
+        condition: service_healthy
+
+volumes:
+  pgdata:

requirements.txt

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+Django==4.2.16
+channels==4.1.0
+channels-postgres>=1.1.4
+daphne==4.1.2
+djangorestframework==3.15.2
+psycopg2-binary==2.9.9
+Pillow==10.4.0
+python-decouple==3.8