fixing pykmip build error

Author: benzekrimaha

.github/pykmip/Dockerfile

@@ -4,20 +4,22 @@ FROM python:3.10-alpine
 # but the repo has fixes for some crashes that slowed down kmip
 
 RUN apk add --no-cache \
-        libressl && \
+        ca-certificates \
+        openssl && \
     apk add --no-cache --virtual .build-deps \
         python3-dev \
         libffi-dev \
-        libressl-dev \
+        openssl-dev \
         sqlite-dev \
         build-base \
         curl \
         git && \
     git clone https://github.com/openkmip/pykmip.git && \
     cd pykmip && \
-    python3 setup.py install && \
+    pip3 install . && \
+    cd / && \
     apk del .build-deps && \
-    rm -rf /pykmip && \
+    rm -rf /var/cache/apk/* /pykmip && \
     mkdir /pykmip
 
 ADD ./bin /usr/local/bin