Bump Mailoney to Alpine 3.15, reduced to Mailoney Code, no PyPi

docker/mailoney/Dockerfile

@@ -1,35 +1,14 @@
-FROM alpine:3.11
+FROM alpine:3.15
 #
 # Install packages
 RUN apk -U --no-cache add \
-            autoconf \
-            automake \
-            build-base \
             git \
             libcap \
-            libtool \
-            py-pip \
-            python \
-            python-dev && \
-#
-# Install libemu    
-    git clone https://github.com/buffer/libemu /root/libemu/ && \
-    cd /root/libemu/ && \
-    git checkout e2624361e13588da74a2ce3e1dea0abb59dcf1d0 && \
-    autoreconf -vi && \
-    ./configure && \
-    make && \
-    make install && \
-#
-# Install libemu python wrapper
-    pip install --no-cache-dir \ 
-                        hpfeeds \
-                        pylibemu && \ 
+            python2 && \
 #
 # Install mailoney from git
     git clone https://github.com/t3chn0m4g3/mailoney /opt/mailoney && \
     cd /opt/mailoney && \
-    git checkout 85c37649a99e1cec3f8d48d509653c9a8127ea4f && \
 #
 # Setup user, groups and configs
     addgroup -g 2000 mailoney && \
@@ -38,12 +17,7 @@ RUN apk -U --no-cache add \
     setcap cap_net_bind_service=+ep /usr/bin/python2.7 && \
 #
 # Clean up
-    apk del --purge autoconf \
-                    automake \
-                    build-base \
-                    git \
-                    py-pip \
-                    python-dev && \
+    apk del --purge git && \
     rm -rf /root/* && \
     rm -rf /var/cache/apk/*
 #