Update rust-training-esp32c3 image

[SergioGasquez]

Our training had a big revamp: esp-rs/std-training#152 and now the Dockerfile from the training gets published in dockerhub.

I will try to create a project for the exercise and solution for all the projects of the training and link them in the training content.

[urish]

Thanks! A questions + request:

1. Is it possible to switch to non-root user? Running under root increases the attack surface of the builder.
2. Please add all the HEXI_ environment variables to the Dockerfile (the ones that you used to test the container), similar to what we have here:

   wokwi-builders/rust-nostd-esp/Dockerfile

   Lines 29 to 32 in 27ea6ed

   	ENV HEXI_SRC_DIR="/home/esp/build-in"
   	ENV HEXI_BUILD_CMD="bash /home/esp/compile.sh"
   	ENV HEXI_OUT_HEX="/home/esp/build-out/project.bin"
   	ENV HEXI_OUT_ELF="/home/esp/build-out/project.elf"

[urish]

Thanks! What about running the build as non-root user?

[SergioGasquez]

Thanks! What about running the build as non-root user?

I am currently doing some testing on that end, sorry I didn't update you. I started doing test and forgot about updating here.
Will keep you posted!

[urish]

Thank you!

[urish]

Ready to merge?

[SergioGasquez]

Ready to merge?

Not yet! Give me a moment to do a round of testing!

[SergioGasquez]

I think now it should be ready to merge!

[urish]

Thanks! Uploading it now, should be up in ~10 minutes or so