updated docker file

Author: sandeepgupta12

.github/scripts/ppc64le/self-hosted-builder/actions-runner.Dockerfile

@@ -4,15 +4,12 @@ FROM ubuntu:22.04
 # Set non-interactive mode for apt
 ENV DEBIAN_FRONTEND=noninteractive
 
-# Fix sources to point to ports.ubuntu.com for ppc64le
+# Fix sources for ppc64le and update system
 RUN echo "deb [arch=ppc64el] http://ports.ubuntu.com/ubuntu-ports jammy main restricted universe multiverse" > /etc/apt/sources.list && \
     echo "deb [arch=ppc64el] http://ports.ubuntu.com/ubuntu-ports jammy-updates main restricted universe multiverse" >> /etc/apt/sources.list && \
     echo "deb [arch=ppc64el] http://ports.ubuntu.com/ubuntu-ports jammy-backports main restricted universe multiverse" >> /etc/apt/sources.list && \
-    echo "deb [arch=ppc64el] http://ports.ubuntu.com/ubuntu-ports jammy-security main restricted universe multiverse" >> /etc/apt/sources.list
-
-
-# Fix sources for ppc64le and update system
-RUN apt-get clean && \
+    echo "deb [arch=ppc64el] http://ports.ubuntu.com/ubuntu-ports jammy-security main restricted universe multiverse" >> /etc/apt/sources.list & \
+    apt-get clean && \
     apt-get update -o Acquire::Retries=5 -o Acquire::http::Timeout="10" && \
     apt-get -y install --no-install-recommends \
     build-essential \
@@ -26,10 +23,12 @@ RUN apt-get clean && \
     vim \
     python3 \
     python3-pip \
-    update-alternatives --set iptables /usr/sbin/iptables-legacy && \
-    update-alternatives --set ip6tables /usr/sbin/ip6tables-legacy && \
     apt-get clean && rm -rf /var/lib/apt/lists/*
 
+# Switch to iptables-legacy
+RUN update-alternatives --set iptables /usr/sbin/iptables-legacy && \
+    update-alternatives --set ip6tables /usr/sbin/ip6tables-legacy
+
 # Add Docker GPG key and repository
 RUN curl -fsSL https://download.docker.com/linux/ubuntu/gpg | gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg && \
     echo "deb [arch=ppc64el signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable" > /etc/apt/sources.list.d/docker.list && \