Ensure we're in /opt directory

Author: fluidnumericsJoe

Dockerfile

@@ -4,8 +4,10 @@ COPY --from=ghcr.io/astral-sh/uv:0.8.21 /uv /uvx /bin/
 ENV UV_COMPILE_BYTECODE=1 UV_LINK_MODE=copy
 COPY pyproject.toml spectre_utils /opt
 RUN --mount=type=cache,target=/root/.cache/uv \
+    cd /opt/ &&\
     uv sync --no-install-project --no-dev
 RUN --mount=type=cache,target=/root/.cache/uv \
+    cd /opt/ &&\
     uv sync --frozen --no-dev
 FROM python:3.13-slim AS runtime
 ENV PATH="/opt/.venv/bin:$PATH"