Replace master branch with local files

backend/.dockerignore

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+# Build artifacts
+build/
+cmake-build-*/
+CMakeCache.txt
+CMakeFiles/
+cmake_install.cmake
+Makefile
+
+# Conan files
+conanfile.txt
+conanfile.py
+conan.lock
+conanbuildinfo.*
+conaninfo.txt
+CMakeUserPresets.json
+.conan/
+.conan2/
+
+# IDE files
+.idea/
+.vscode/
+*.swp
+*.swo
+*~
+
+# OS files
+.DS_Store
+Thumbs.db
+
+# Compiled objects
+*.o
+*.a
+*.so
+*.dylib
+
+# Executables
+streaming-backend