change .build.yml to use prebuilt toolchain image

.build.yml

@@ -11,36 +11,10 @@ steps:
   commands:
   - git submodule update --init --recursive
 
-- name: patch
-  image: alpine/git
+- name: firmware
+  image: docker-repo.service.intern.lab.or.it:5000/fiatlux-build-env
   depends_on: [ submodules ]
   commands:
-  - |-
-    sed -i 's/GNU bash, version (3\\\.\[1-9\]|4)/GNU bash, version (3.[1-9]|4|5)/g' modules/sdk/crosstool-NG/configure.ac
-
-  - mkdir -p modules/sdk/crosstool-NG/.build/tarballs
-  - wget https://github.com/libexpat/libexpat/releases/download/R_2_1_0/expat-2.1.0.tar.gz -O modules/sdk/crosstool-NG/.build/tarballs/expat-2.1.0.tar.gz
-
-- name: toolchain
-  image: debian:sid
-  depends_on: [ patch ]
-  commands:
-  - apt update
-  - apt install -y make bash gawk g++ gcc libc6-dev flex bison automake autoconf gperf texinfo wget git bzip2 help2man libtool libtool-bin unrar-free unzip ncurses-dev libexpat-dev python-dev python3
-  - cd modules/sdk
-  - export CT_EXPERIMENTAL=y
-  - export CT_ALLOW_BUILD_AS_ROOT=y
-  - export CT_ALLOW_BUILD_AS_ROOT_SURE=y
-  - make standalone=y -j$(nproc)
-  - wget -N https://raw.githubusercontent.com/espressif/esptool/master/esptool.py -O xtensa-lx106-elf/bin/esptool.py
-
-- name: firmware
-  image: debian:sid
-  depends_on: [ toolchain ]
-  commands:
-  - apt update
-  - apt remove --purge -y python2
-  - apt install -y make python3 python3-serial python-is-python3 perl
   - export PATH=$(pwd)/modules/sdk/xtensa-lx106-elf/bin:$PATH
   - make firmware -j$(nproc)
 
@@ -60,7 +34,7 @@ steps:
 
 - name: unittest
   image: debian:sid
-  depends_on: [ patch ]
+  depends_on: [ firmware ]
   commands:
   - apt update
   - apt install -y make