CMAKE_CONFIG_TYPE doesn't seem to work

This partially reverts commit ae45189436.

.github/workflows/linux.yml

@@ -104,7 +104,7 @@ jobs:
           docker run --rm \
           -u $(id -u) \
           -v $PWD:/usr/src/tdesktop \
-          -e CMAKE_CONFIG_TYPE=Debug \
+          -e CONFIG=Debug \
           $IMAGE_TAG \
           /usr/src/tdesktop/Telegram/build/docker/centos_env/build.sh \
           -D CMAKE_CONFIGURATION_TYPES=Debug \

Telegram/build/docker/centos_env/Dockerfile

@@ -44,7 +44,6 @@ ENV CXXFLAGS $CFLAGS
 
 ENV CMAKE_GENERATOR Ninja
 ENV CMAKE_BUILD_TYPE None
-ENV CMAKE_CONFIG_TYPE Release
 ENV CMAKE_BUILD_PARALLEL_LEVEL ''
 
 FROM builder AS patches

Telegram/build/docker/centos_env/build.sh

@@ -3,4 +3,4 @@ set -e
 
 cd Telegram
 ./configure.sh "$@"
-cmake --build ../out
+cmake --build ../out --config "${CONFIG:-Release}"

docs/building-linux.md

@@ -32,7 +32,7 @@ Or, to create a debug build, run (also using [your **api_id** and **api_hash**](
     docker run --rm -it \
         -u $(id -u) \
         -v "$PWD:/usr/src/tdesktop" \
-        -e CMAKE_CONFIG_TYPE=Debug \
+        -e CONFIG=Debug \
         tdesktop:centos_env \
         /usr/src/tdesktop/Telegram/build/docker/centos_env/build.sh \
         -D TDESKTOP_API_ID=YOUR_API_ID \