fix: correct SHA length matching in main-latest filename generation (#187)

* feat: enhance Docker build system with advanced version selection

## New Features
- Add force_rebuild parameter for Docker workflow manual triggers
- Improve version pattern matching with better regex validation
- Add comprehensive Docker Build Guide documentation
- Enhanced logging and error reporting for build process
- Support for prerelease version detection (alpha, beta, rc)

## Improvements
- Better version pattern validation for releases and dev builds
- More detailed build logs with context and warnings
- Clear documentation for all Docker image variants and use cases
- Updated README with Docker version examples and guide reference

## Documentation
- New comprehensive Docker Build Guide (docs/DOCKER_BUILD_GUIDE.md)
- Updated README with version-specific Docker examples
- Workflow dependency diagram and troubleshooting guide
- Complete reference for all supported version patterns

This enhancement provides a robust, well-documented Docker build system
that supports flexible version selection while maintaining deterministic
build behavior without fallback mechanisms.

* fix: simplify dev version regex pattern in docker workflow

* fix: simplify version number regex pattern in docker workflow

* feat: remove docs directory

* fix: correct SHA length matching in main-latest filename generation

.github/workflows/build.yml

@@ -390,7 +390,7 @@ jobs:
 
             # Create main-latest version filename
             # Convert from rustfs-linux-x86_64-dev-abc123 to rustfs-linux-x86_64-main-latest
-            MAIN_LATEST_NAME=$(echo "$PACKAGE_NAME" | sed 's/-dev-[a-f0-9]\{7\}$/-main-latest/')
+            MAIN_LATEST_NAME=$(echo "$PACKAGE_NAME" | sed 's/-dev-[a-f0-9]\+$/-main-latest/')
             MAIN_LATEST_FILE="${MAIN_LATEST_NAME}.zip"
 
             # Copy the original file to main-latest version