add pyenv

Author: dgtlmoon

.github/test/Dockerfile-alpine

@@ -27,6 +27,7 @@ RUN \
     poppler-utils \
     python3 && \
   echo "**** pip3 install test of changedetection.io ****" && \
+  python3 -m venv /lsiopy  && \
   pip install -U pip wheel setuptools && \
   pip install -U --no-cache-dir --find-links https://wheel-index.linuxserver.io/alpine-3.21/ -r /requirements.txt && \
   apk del --purge \