Replace espressif.com with github.com for faster download
diff --git a/docker/linux/Dockerfile b/docker/linux/Dockerfile
index 8b4f607..be5412c 100644
--- a/docker/linux/Dockerfile
+++ b/docker/linux/Dockerfile
@@ -102,7 +102,7 @@
FROM nuttx-toolchain-base AS nuttx-toolchain-esp32
# Download the latest ESP32 GCC toolchain prebuilt by Espressif
RUN mkdir xtensa-esp32-elf-gcc && \
- curl -s -L "https://dl.espressif.com/dl/xtensa-esp32-elf-gcc8_4_0-esp-2020r3-linux-amd64.tar.gz" \
+ curl -s -L "https://github.com/espressif/crosstool-NG/releases/download/esp-2020r3/xtensa-esp32-elf-gcc8_4_0-esp-2020r3-linux-amd64.tar.gz" \
| tar -C xtensa-esp32-elf-gcc --strip-components 1 -xJ
RUN apt-get update -qq && DEBIAN_FRONTEND="noninteractive" apt-get install -y -qq --no-install-recommends \
