Optimize docker container building

Author: PythonCoderAS

Dockerfile

@@ -14,11 +14,15 @@ WORKDIR /app
 
 # Path: /app/requirements.txt
 COPY --from=generate-requirements /app/requirements.txt ./
+RUN ["python3", "-m", "venv", "/venv"]
+ENV PATH="/venv/bin:$PATH"
+RUN ["python3", "-m", "pip", "install", "-r", "requirements.txt"]
 
-RUN ["pip", "install", "-r", "requirements.txt"]
-
+FROM python:3.12-slim as production
+COPY --from=build /venv /venv
 COPY src/main.py .
+ENV PATH="/venv/bin:$PATH"
 
-ENTRYPOINT [ "uvicorn", "main:app", "--host", "0.0.0.0", "--port", "8000", "--proxy-headers" ]
+ENTRYPOINT [ "python3", "-m", "uvicorn", "main:app", "--host", "0.0.0.0", "--port", "8000", "--proxy-headers" ]
 
 EXPOSE 8000

src/main.py

@@ -167,7 +167,7 @@ async def repeat_url_worker():
 async def lifespan(_: FastAPI):
     global engine, async_session
     if engine is None:
-        engine = sqlalchemy.ext.asyncio.create_async_engine(environ.get("DATABASE_URL", "sqlite://db.sqlite"))
+        engine = sqlalchemy.ext.asyncio.create_async_engine(environ.get("DATABASE_URL", "sqlite:///db.sqlite"))
     async_session = sqlalchemy.ext.asyncio.async_sessionmaker(engine, expire_on_commit=False)
     async with engine.begin() as conn:
         await conn.run_sync(Base.metadata.create_all)