Dockerfile

@@ -2,18 +2,16 @@ FROM python:3.7-alpine as base
 
 FROM base as builder
 
-RUN mkdir /install
+# add build utils (gcc, others)
-WORKDIR /install
+RUN apk add build-base
-
-COPY requirements.txt /requirements.txt
-
-RUN pip install --install-option="--prefix=/install" -r /requirements.txt
 
 FROM base
 
-COPY --from=builder /install /usr/local
 COPY . /bumper
 
 WORKDIR /bumper
 
+# install required python packages
+RUN pip3 install -r requirements.txt
+
 ENTRYPOINT ["python3", "-m", "bumper"]

appveyor.yml

@@ -9,7 +9,7 @@ environment:
 
 install:
   - pip install pipenv
-  - pipenv --python 3
+  - pipenv --python 3.7
   - pipenv install --dev
 
 build: off