Add build deps for psutil

src/Containerfile

@@ -10,7 +10,11 @@ ENV PYTHONUNBUFFERED=1 \
 RUN --mount=type=cache,target=/var/cache/apk,sharing=locked \
     apk add --no-cache \
     docker-cli \
-    ca-certificates
+    ca-certificates \
+    gcc \
+    musl-dev \
+    linux-headers \
+    python3-dev
 
 WORKDIR /app
 
@@ -21,7 +25,7 @@ RUN --mount=type=cache,target=/root/.cache/pip \
 
 COPY collectors/ ./collectors/
 COPY exporters/ ./exporters/
-COPY aggregator.py main.py ./
+COPY aggregator.py main.py utils.py ./
 
 HEALTHCHECK --interval=60s --timeout=10s --start-period=10s --retries=3 \
     CMD python -c "import sys; sys.exit(0)"