Fix Docker build: run docker directly instead of TeamCity wrapper

.teamcity/settings.kts

@@ -52,11 +52,14 @@ object Build : BuildType({
                 echo "Branch: %teamcity.build.branch%"
                 echo ""
 
-                # Set Zephyr environment
-                export ZEPHYR_BASE=/workdir/zephyr
-                export ZEPHYR_TOOLCHAIN_VARIANT=zephyr
+                # Run build inside Docker container
+                docker run --rm \
+                    -v "${'$'}(pwd):/project" \
+                    -w /project \
+                    ghcr.io/zephyrproject-rtos/ci:v0.26.13 \
+                    bash -c '
+                        set -e
 
-                # Show west version
                         echo "West version:"
                         west --version
                         echo ""
@@ -79,9 +82,8 @@ object Build : BuildType({
                         echo "Build artifacts:"
                         ls -lh build/zephyr/*.bin 2>/dev/null || true
                         ls -lh build/zephyr/*.hex 2>/dev/null || true
+                    '
             """.trimIndent()
-            dockerImage = "ghcr.io/zephyrproject-rtos/ci:v0.26.13"
-            dockerPull = true
         }
     }