title: Use asyncpg python module in alpine docker image
body: <p>I'm trying to build an image based on <code>python:3-8.alpine</code>, using the python module <code>asyncpg</code>.</p>
  
  <p>Here is a part of my Dockerfile:</p>
  
  <pre><code>FROM python:3.8-alpine
  
  RUN apk add gcc
  RUN apk add python3-dev
  
  RUN pip3 install asyncpg
  </code></pre>
  
  <p>I added <code>gcc</code> and <code>python3-dev</code> because I think I need them to be able to build <code>asyncpg</code> according to the documentation : <a href="https://magicstack.github.io/asyncpg/current/installation.html" rel="nofollow noreferrer">https://magicstack.github.io/asyncpg/current/installation.html</a> (but i'm not sure of that, I think I should be able to install without building this module)</p>
  
  <p>But I have the following error when building the image:</p>
  
  <pre><code>gcc -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -DTHREAD_STACK_SIZE=0x100000 -fPIC -I/usr/local/include/python3.8 -c asyncpg/pgproto/pgproto.c -o build/temp.linux-x86_64-3.8/asyncpg/pgproto/pgproto.o -O2 -fsigned-char -Wall -Wsign-compare -Wconversion
  In file included from asyncpg/pgproto/pgproto.c:29:
  /usr/local/include/python3.8/Python.h:11:10: fatal error: limits.h: No such file or directory
      11 | #include &lt;limits.h&gt;
         |          ^~~~~~~~~~
  compilation terminated.
  error: command 'gcc' failed with exit status 1
  </code></pre>
  
  <p>How can I solve this error and install <code>asyncpg</code> ? </p>
  
  <p>Thanks</p>