fix: Hopefully work

Dockerfile

@@ -1,22 +1,33 @@
-# build stage
 FROM python:3.10-slim as base
 
+LABEL org.opencontainers.image.source="https://github.com/ZiRO-Bot/nexus"
+LABEL org.opencontainers.image.description="FastAPI-based backend"
+LABEL org.opencontainers.image.licenses=MPL-2.0
+
 # ---
 FROM base as builder
 
+WORKDIR /app
+
+ENV PATH="/root/.local/bin:${PATH}" \
+    VIRTUAL_ENV="/venv"
+
 RUN pip install -U pip setuptools wheel
 RUN pip install pdm
 
-COPY pyproject.toml pdm.lock README.md /project/
-COPY nexus/ /project/nexus
-
-WORKDIR /project
-RUN mkdir __pypackages__ && pdm sync --prod --no-editable
+COPY pyproject.toml pdm.lock ./
+COPY nexus/ ./
+RUN pdm sync --prod --no-editable
 
 # ---
 FROM base as final
 
-WORKDIR /project
-COPY --from=builder /project/nexus ./nexus
+WORKDIR /app
+
+ENV PATH="/venv/bin:${PATH}" \
+    VIRTUAL_ENV="/venv"
+
+COPY --from=builder /venv /venv
+COPY --from=builder /app/nexus/ /app/nexus
 
 CMD ["uvicorn", "nexus.app:app", "--proxy-headers", "--host", "0.0.0.0", "--port", "80"]