Continue work on builder

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

docker/log4pot/Dockerfile

@@ -1,8 +1,18 @@
 FROM ubuntu:22.04
 ENV DEBIAN_FRONTEND noninteractive
+ARG PROXY
+ENV http_proxy=${PROXY}
 #
-# Install packages
-RUN apt-get update -y && \
+# Check if APT_PROXY is set and configure apt to use the proxy
+RUN bash -c 'if [ -n "${http_proxy}" ]; then \
+                 echo "Using APT proxy at ${http_proxy}"; \
+                 echo "Acquire::http::Proxy \"${http_proxy}\";" > /etc/apt/apt.conf.d/01proxy; \
+               else \
+                 echo "APT proxy not configured, proceeding without proxy"; \
+             fi' && \
+#    bash -c 'echo "Acquire::http::Proxy::ports.ubuntu.com DIRECT;" > /etc/apt/apt.conf.d/99force-no-proxy' && \
+# Setup apt
+    apt-get update -y && \
     apt-get install -y \
 		build-essential \
 		cargo \
@@ -19,8 +29,8 @@ RUN apt-get update -y && \
 		python3 \
 		python3-dev \
 		rust-all && \
-     pip3 install --upgrade pip && \
-     pip3 install poetry pycurl && \
+    pip3 install --upgrade pip && \
+    pip3 install poetry pycurl && \
 #	     
 # Install log4pot from GitHub and setup
     mkdir -p /opt /var/log/log4pot && \
@@ -46,8 +56,9 @@ RUN apt-get update -y && \
 		libssl-dev \
 		python3-dev \
 		rust-all && \
-   apt-get autoremove -y --purge && \
-   apt-get clean && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/* /root/.cache /opt/Log4Pot/.git
+    apt-get autoremove -y --purge && \
+    apt-get clean && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/* /root/.cache /opt/Log4Pot/.git
+ENV http_proxy=""
 #
 # Start log4pot
 STOPSIGNAL SIGINT