use alpine pip3

Dockerfile

@@ -1,16 +1,16 @@
 FROM alpine:3.19
 
 # Install python and build-dependencies for uWSGI
-RUN apk add --update --no-cache python3 python3-dev build-base linux-headers pcre-dev && ln -sf python3 /usr/bin/python
+RUN apk add --update --no-cache python3 python3-dev py3-pip build-base linux-headers pcre-dev && ln -sf python3 /usr/bin/python
 
 # Install pip, currently not needed, as installed by apk
 # RUN python3 -m ensurepip
-RUN pip install --no-cache --upgrade pip setuptools
+RUN pip3 install --no-cache --upgrade pip setuptools
 
 # Install dependencies
 COPY ./requirements.txt /app/requirements.txt
 WORKDIR /app
-RUN pip install --no-cache -r requirements.txt
+RUN pip3 install --no-cache -r requirements.txt
 
 # Install application and configs
 COPY . /app