feat: add Dockerfile and docker-compose configuration for containerization

Author: Pranavseelam06

.dockerignore

@@ -0,0 +1,12 @@
+.venv
+__pycache__
+*.pyc
+.git
+.gitignore
+.env
+.pytest_cache
+.DS_Store
+README.md
+.github
+tests
+alembic/versions/__pycache__

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 --no-cache-dir -r requirements.txt
+
+COPY app/ ./app/
+COPY alembic/ ./alembic/
+COPY alembic.ini .
+
+EXPOSE 8000
+
+CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "8000"]

docker-compose.yml

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+services:
+  db:
+    image: postgres:16
+    environment:
+      POSTGRES_USER: gatekeeper_app
+      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD}
+      POSTGRES_DB: gatekeeper
+    volumes:
+      - postgres_data:/var/lib/postgresql/data
+    ports:
+      - "5432:5432"
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U gatekeeper_app -d gatekeeper"]
+      interval: 5s
+      timeout: 5s
+      retries: 5
+
+  app:
+    build: .
+    depends_on:
+      db:
+        condition: service_healthy
+    environment:
+      DATABASE_URL: postgresql://gatekeeper_app:${POSTGRES_PASSWORD}@db:5432/gatekeeper
+      TEST_DATABASE_URL: postgresql://gatekeeper_app:${POSTGRES_PASSWORD}@db:5432/gatekeeper_test
+    ports:
+      - "8000:8000"
+    command: >
+      sh -c "alembic upgrade head && uvicorn app.main:app --host 0.0.0.0 --port 8000"
+
+volumes:
+  postgres_data: