Fix borken install and switch to the new pyscopg3

Author: ionelmc

Dockerfile

@@ -4,13 +4,13 @@ FROM alpine:latest as dist
 RUN apk add --no-cache --virtual build-deps gcc python3-dev musl-dev py3-pip py3-wheel postgresql-dev
 RUN mkdir -p /build/dist
 WORKDIR /build
-RUN pip wheel --wheel-dir=dist psycopg2
+RUN pip wheel --wheel-dir=dist psycopg[c]
 ADD . /build
 RUN python3 setup.py bdist_wheel
 
 FROM alpine:latest
 RUN apk add --no-cache py3-pip libpq
 RUN --mount=type=bind,from=dist,src=/build/dist,target=/dist \
-    pip install /dist/*
+    pip install --break-system-packages /dist/*
 
 ENTRYPOINT ["holdup"]