Install helm from apt repo

Dockerfile

@@ -4,4 +4,9 @@ RUN sudo apt update -y && \
     sudo apt install -y \
     curl git
 
-RUN curl https://raw.githubusercontent.com/helm/helm/main/scripts/get-helm-3 | bash
+RUN curl https://baltocdn.com/helm/signing.asc | gpg --dearmor | sudo tee /usr/share/keyrings/helm.gpg > /dev/null && \
+    sudo apt-get install apt-transport-https --yes && \
+    echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/helm.gpg] https://baltocdn.com/helm/stable/debian/ all main" | sudo tee /etc/apt/sources.list.d/helm-stable-debian.list && \
+    sudo apt-get update && \
+    sudo apt-get install -y \
+    helm