Fix docker build

Dockerfile

@@ -1,11 +1,12 @@
-FROM python:3.10-alpine
+FROM python:3.10-alpine3.15
 
 ARG BBP_GIT_INFO=""
 
 WORKDIR /src
 COPY requirements.txt /
 
 RUN apk update && \
+    apk upgrade && \
     apk add git rsync nodejs npm && \
     python -m venv /venv && \
     /venv/bin/python -m pip install --upgrade pip && \
@@ -19,8 +20,8 @@ RUN /venv/bin/python -m pip install -r /requirements.txt
 # Apply rdflib fixes
 RUN /venv/bin/python -m pip install git+https://github.com/avillar/[email protected]
 
-ENV PYTHONPATH /src/
-ENV PYTHONUNBUFFERED 1
+ENV PYTHONPATH=/src/
+ENV PYTHONUNBUFFERED=1
 ENV NODE_PATH=/src/node_modules
 ENV BBP_GIT_INFO_FILE=/GIT_INFO