HF: relax pip wheel-only; upgrade pip tools

Dockerfile

@@ -19,13 +19,14 @@ WORKDIR /app
 
 # Build-time info + cache-bust:
 # Changing APP_BUILD forces Docker to re-run subsequent layers (including pip install).
-ARG APP_BUILD=8
+ARG APP_BUILD=9
 ENV APP_BUILD=${APP_BUILD}
 RUN echo "Docker build start: APP_BUILD=${APP_BUILD}" && python -V
 
 # Install Python dependencies
 COPY requirements.txt .
-RUN pip install --no-cache-dir --disable-pip-version-check --default-timeout=120 --prefer-binary --only-binary=:all: -r requirements.txt -v
+RUN pip install --no-cache-dir --disable-pip-version-check --default-timeout=120 -U pip setuptools wheel
+RUN pip install --no-cache-dir --disable-pip-version-check --default-timeout=120 --prefer-binary -r requirements.txt -v
 
 # Copy application code
 COPY . .