fix: curl - retry DNS failures too (#7009)

Signed-off-by: Dmitry Tokarev <dtokarev@nvidia.com>

container/README.md

@@ -254,7 +254,7 @@ The frontend image is a specialized container that includes the Dynamo component
 **Build EPP Image**
 ```bash
 sudo apt-get update && sudo apt-get install -y git build-essential protobuf-compiler libclang-dev
-curl https://sh.rustup.rs -sSf | sh -s -- -y --default-toolchain stable
+curl --retry 5 --retry-delay 3 -sSf https://sh.rustup.rs | sh -s -- -y --default-toolchain stable
 . "$HOME/.cargo/env"
 cargo install cbindgen
 

container/templates/trtllm_runtime.Dockerfile

@@ -98,7 +98,7 @@ RUN --mount=type=cache,target=/var/cache/apt,sharing=locked \
     else \
         ARCH_FOR_GPG="sbsa"; \
     fi && \
-    curl -fsSL \
+    curl -fsSL --retry 5 --retry-delay 3 \
         https://developer.download.nvidia.com/compute/cuda/repos/ubuntu2404/${ARCH_FOR_GPG}/cuda-archive-keyring.gpg \
         -o /usr/share/keyrings/cuda-archive-keyring.gpg &&\
     echo "deb [signed-by=/usr/share/keyrings/cuda-archive-keyring.gpg] \

container/templates/wheel_builder.Dockerfile

@@ -244,7 +244,7 @@ RUN --mount=type=secret,id=aws-key-id,env=AWS_ACCESS_KEY_ID \
     dnf install -y pkg-config; \
     fi && \
     cd /tmp && \
-    curl -LO https://ffmpeg.org/releases/ffmpeg-${FFMPEG_VERSION}.tar.xz && \
+    curl --retry 5 --retry-delay 3 -LO https://ffmpeg.org/releases/ffmpeg-${FFMPEG_VERSION}.tar.xz && \
     tar xf ffmpeg-${FFMPEG_VERSION}.tar.xz && \
     cd ffmpeg-${FFMPEG_VERSION} && \
     ./configure \