Add new deps, writen a db engine, docker-compose and .env-example

.gitignore

@@ -1,3 +1,5 @@
 .vscode
 /backend/pyrightconfig.json
 /backend/.python-version
+/backend/.env
+/backend/app/.env

backend/app/.env-example

@@ -0,0 +1,5 @@
+POSTGRES_USER=
+POSTGRES_PASSWORD=
+POSTGRES_DB=
+POSTGRES_HOST=
+POSTGRES_PORT=

backend/app/db_engine.py

@@ -0,0 +1,42 @@
+from sqlalchemy.ext.asyncio import AsyncSession, create_async_engine, async_sessionmaker
+from sqlalchemy.orm import DeclarativeBase
+import dotenv
+import os
+
+dotenv.load_dotenv()
+
+PG_USER = dotenv.get_key(".env", "PG_USER")
+PG_PASSWORD = dotenv.get_key(".env", "PG_PASSWORD")
+PG_HOST = dotenv.get_key(".env", "PG_HOST")
+PG_PORT = dotenv.get_key(".env", "PG_PORT")
+PG_DB = dotenv.get_key(".env", "PG_DB")
+
+DATABASE_URL = (
+    f"postgresql+asyncpg://{PG_USER}:{PG_PASSWORD}@{PG_HOST}:{PG_PORT}/{PG_DB}"
+)
+
+engine = create_async_engine(
+    DATABASE_URL,
+    echo=False,     
+    future=True,
+)
+
+async_session_maker = async_sessionmaker(
+    engine,
+    class_=AsyncSession,
+    expire_on_commit=False,
+)
+
+
+class Base(DeclarativeBase):
+    pass
+
+async def get_async_session():
+    async with async_session_maker() as session:
+        yield session
+
+
+async def init_db():
+    async with engine.begin() as conn:
+        await conn.run_sync(Base.metadata.create_all)
+

backend/app/models/posts.py

@@ -0,0 +1,15 @@
+from sqlalchemy import Column, Integer, String, ForeignKey, DateTime
+from sqlalchemy.orm import relationship
+
+from app.db_engine import Base
+
+
+class Post(Base):
+    __tablename__ = "posts"
+
+    id = Column(Integer, primary_key=True, index=True, autoincrement=True, nullable=False)
+    title = Column(String, index=True, nullable=False)
+    content = Column(String, index=True, nullable=False)
+    images = Column(String, index=True)
+    updated_at = Column(DateTime, index=True)
+

backend/docker-compose.yml

@@ -0,0 +1,36 @@
+services:
+  postgres:
+    image: postgres:18-alpine3.22
+    ports:
+      - "5432:5432"
+    environment:
+      POSTGRES_USER: ${POSTGRES_USER}
+      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD}
+      POSTGRES_DB: ${POSTGRES_DB}
+    volumes:
+      - postgres:/var/lib/postgresql/data
+    networks:
+      - backend
+
+  backend:
+    build: .
+    ports:
+      - "8000:8000"
+    environment:
+      - POSTGRES_USER=${POSTGRES_USER}
+      - POSTGRES_PASSWORD=${POSTGRES_PASSWORD}
+      - POSTGRES_DB=${POSTGRES_DB}
+      - POSTGRES_HOST=${POSTGRES_HOST}
+      - POSTGRES_PORT=${POSTGRES_PORT}
+    depends_on:
+      - postgres
+    networks:
+      - backend
+
+volumes:
+  postgres:
+    driver: local
+
+networks:
+  backend:
+    driver: bridge

backend/pyproject.toml

@@ -5,7 +5,9 @@ description = "Add your description here"
 readme = "README.md"
 requires-python = ">=3.13"
 dependencies = [
+    "asyncpg>=0.30.0",
     "fastapi>=0.121.3",
+    "python-dotenv>=1.2.1",
     "sqlalchemy>=2.0.44",
     "uvicorn>=0.38.0",
 ]

backend/uv.lock

@@ -33,19 +33,39 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/15/b3/9b1a8074496371342ec1e796a96f99c82c945a339cd81a8e73de28b4cf9e/anyio-4.11.0-py3-none-any.whl", hash = "sha256:0287e96f4d26d4149305414d4e3bc32f0dcd0862365a4bddea19d7a1ec38c4fc", size = 109097, upload-time = "2025-09-23T09:19:10.601Z" },
 ]
 
+[[package]]
+name = "asyncpg"
+version = "0.30.0"
+source = { registry = "https://pypi.org/simple" }
+sdist = { url = "https://files.pythonhosted.org/packages/2f/4c/7c991e080e106d854809030d8584e15b2e996e26f16aee6d757e387bc17d/asyncpg-0.30.0.tar.gz", hash = "sha256:c551e9928ab6707602f44811817f82ba3c446e018bfe1d3abecc8ba5f3eac851", size = 957746, upload-time = "2024-10-20T00:30:41.127Z" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/3a/22/e20602e1218dc07692acf70d5b902be820168d6282e69ef0d3cb920dc36f/asyncpg-0.30.0-cp313-cp313-macosx_10_13_x86_64.whl", hash = "sha256:05b185ebb8083c8568ea8a40e896d5f7af4b8554b64d7719c0eaa1eb5a5c3a70", size = 670373, upload-time = "2024-10-20T00:29:55.165Z" },
+    { url = "https://files.pythonhosted.org/packages/3d/b3/0cf269a9d647852a95c06eb00b815d0b95a4eb4b55aa2d6ba680971733b9/asyncpg-0.30.0-cp313-cp313-macosx_11_0_arm64.whl", hash = "sha256:c47806b1a8cbb0a0db896f4cd34d89942effe353a5035c62734ab13b9f938da3", size = 634745, upload-time = "2024-10-20T00:29:57.14Z" },
+    { url = "https://files.pythonhosted.org/packages/8e/6d/a4f31bf358ce8491d2a31bfe0d7bcf25269e80481e49de4d8616c4295a34/asyncpg-0.30.0-cp313-cp313-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:9b6fde867a74e8c76c71e2f64f80c64c0f3163e687f1763cfaf21633ec24ec33", size = 3512103, upload-time = "2024-10-20T00:29:58.499Z" },
+    { url = "https://files.pythonhosted.org/packages/96/19/139227a6e67f407b9c386cb594d9628c6c78c9024f26df87c912fabd4368/asyncpg-0.30.0-cp313-cp313-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:46973045b567972128a27d40001124fbc821c87a6cade040cfcd4fa8a30bcdc4", size = 3592471, upload-time = "2024-10-20T00:30:00.354Z" },
+    { url = "https://files.pythonhosted.org/packages/67/e4/ab3ca38f628f53f0fd28d3ff20edff1c975dd1cb22482e0061916b4b9a74/asyncpg-0.30.0-cp313-cp313-musllinux_1_2_aarch64.whl", hash = "sha256:9110df111cabc2ed81aad2f35394a00cadf4f2e0635603db6ebbd0fc896f46a4", size = 3496253, upload-time = "2024-10-20T00:30:02.794Z" },
+    { url = "https://files.pythonhosted.org/packages/ef/5f/0bf65511d4eeac3a1f41c54034a492515a707c6edbc642174ae79034d3ba/asyncpg-0.30.0-cp313-cp313-musllinux_1_2_x86_64.whl", hash = "sha256:04ff0785ae7eed6cc138e73fc67b8e51d54ee7a3ce9b63666ce55a0bf095f7ba", size = 3662720, upload-time = "2024-10-20T00:30:04.501Z" },
+    { url = "https://files.pythonhosted.org/packages/e7/31/1513d5a6412b98052c3ed9158d783b1e09d0910f51fbe0e05f56cc370bc4/asyncpg-0.30.0-cp313-cp313-win32.whl", hash = "sha256:ae374585f51c2b444510cdf3595b97ece4f233fde739aa14b50e0d64e8a7a590", size = 560404, upload-time = "2024-10-20T00:30:06.537Z" },
+    { url = "https://files.pythonhosted.org/packages/c8/a4/cec76b3389c4c5ff66301cd100fe88c318563ec8a520e0b2e792b5b84972/asyncpg-0.30.0-cp313-cp313-win_amd64.whl", hash = "sha256:f59b430b8e27557c3fb9869222559f7417ced18688375825f8f12302c34e915e", size = 621623, upload-time = "2024-10-20T00:30:09.024Z" },
+]
+
 [[package]]
 name = "backend"
 version = "0.1.0"
 source = { virtual = "." }
 dependencies = [
+    { name = "asyncpg" },
     { name = "fastapi" },
+    { name = "python-dotenv" },
     { name = "sqlalchemy" },
     { name = "uvicorn" },
 ]
 
 [package.metadata]
 requires-dist = [
+    { name = "asyncpg", specifier = ">=0.30.0" },
     { name = "fastapi", specifier = ">=0.121.3" },
+    { name = "python-dotenv", specifier = ">=1.2.1" },
     { name = "sqlalchemy", specifier = ">=2.0.44" },
     { name = "uvicorn", specifier = ">=0.38.0" },
 ]
@@ -200,6 +220,15 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/9f/ed/068e41660b832bb0b1aa5b58011dea2a3fe0ba7861ff38c4d4904c1c1a99/pydantic_core-2.41.5-cp314-cp314t-win_arm64.whl", hash = "sha256:35b44f37a3199f771c3eaa53051bc8a70cd7b54f333531c59e29fd4db5d15008", size = 1974769, upload-time = "2025-11-04T13:42:01.186Z" },
 ]
 
+[[package]]
+name = "python-dotenv"
+version = "1.2.1"
+source = { registry = "https://pypi.org/simple" }
+sdist = { url = "https://files.pythonhosted.org/packages/f0/26/19cadc79a718c5edbec86fd4919a6b6d3f681039a2f6d66d14be94e75fb9/python_dotenv-1.2.1.tar.gz", hash = "sha256:42667e897e16ab0d66954af0e60a9caa94f0fd4ecf3aaf6d2d260eec1aa36ad6", size = 44221, upload-time = "2025-10-26T15:12:10.434Z" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/14/1b/a298b06749107c305e1fe0f814c6c74aea7b2f1e10989cb30f544a1b3253/python_dotenv-1.2.1-py3-none-any.whl", hash = "sha256:b81ee9561e9ca4004139c6cbba3a238c32b03e4894671e181b671e8cb8425d61", size = 21230, upload-time = "2025-10-26T15:12:09.109Z" },
+]
+
 [[package]]
 name = "sniffio"
 version = "1.3.1"