use alpine image to fix #3

Dockerfile

@@ -1,26 +1,26 @@
-FROM python:3.10-slim-bullseye as base
+FROM python:3.10-alpine as base
 
 FROM base as builder
 
 ENV PYTHONUNBUFFERED 1
 
-RUN apt-get update && apt-get -y install build-essential libssl-dev libffi-dev python3-dev cargo libpq-dev && \
+RUN apk update &&\
+    apk add python3-dev musl-dev build-base gcc libffi-dev libressl-dev postgresql-dev cargo &&\
+    rm -rf /var/cache/apk/* &&\
     mkdir /install
 WORKDIR /install
 COPY requirements.txt .
-RUN python -m pip install --no-cache-dir --upgrade pip && \
-    pip install --prefix=/install --no-cache-dir -r requirements.txt && \
-    rm -rf /var/lib/apt/lists/* && \
-    apt-get clean
+RUN python -m pip install --no-cache-dir --upgrade pip &&\
+    pip install --prefix=/install --no-cache-dir -r requirements.txt
 
 FROM base
 
 COPY --from=builder /install /usr/local
 COPY app /app
 WORKDIR /app
-RUN apt-get update && \
-    apt-get -y install iputils-ping nmap curl && \
-    rm -rf /var/lib/apt/lists/*
+RUN apk update &&\
+    apk add iputils nmap curl bash &&\
+    rm -rf /var/cache/apk/*
 
 HEALTHCHECK --interval=10s \
     CMD curl -fs "http://localhost:$DJANGO_PORT/health/" || exit 1