Continue work on builder

- add conditional proxy support
- use xargs to parallelize image builds
- some tweaking and notes

docker/adbhoney/Dockerfile

@@ -1,10 +1,19 @@
 FROM alpine:3.19
+ARG PROXY
+ENV http_proxy=${PROXY}
 #
 # Include dist
 COPY dist/ /root/dist/
 #
-# Install packages
-RUN apk --no-cache -U add \
+# Install packages, use proxy if available and cache using http
+RUN ash -c 'if [ -n "${http_proxy}" ]; then \
+                 sed -i "s/https/http/g" /etc/apk/repositories; \
+                 echo "Using HTTP Proxy at ${http_proxy}"; \
+               else \
+                 echo "HTTP Proxy not configured, proceeding without proxy"; \
+             fi' && \
+# Setup apk
+	apk --no-cache -U add \
 		git \
 		procps \
 		py3-psutil \
@@ -28,7 +37,9 @@ RUN apk --no-cache -U add \
 #
 # Clean up
     apk del --purge git && \
+    sed -i "s/http/https/g" /etc/apk/repositories && \
     rm -rf /root/* /opt/adbhoney/.git /var/cache/apk/*
+ENV http_proxy=""
 #
 # Set workdir and start adbhoney
 STOPSIGNAL SIGINT