add git hooks for commit validation, auto-suggestions, and Docker build/push automation on git push

.githooks/prepare-commit-msg

@@ -0,0 +1,46 @@
+#!/bin/bash
+# Prepare commit message hook: auto-generate commit message based on changes
+
+COMMIT_MSG_FILE=$1
+COMMIT_SOURCE=$2
+
+# Only suggest message for regular commits (not merge, squash, etc.)
+if [ -z "$COMMIT_SOURCE" ] || [ "$COMMIT_SOURCE" = "message" ]; then
+    # Get list of changed files
+    CHANGED_FILES=$(git diff --cached --name-only --diff-filter=ACM)
+    
+    if [ -z "$CHANGED_FILES" ]; then
+        exit 0
+    fi
+    
+    # Determine commit type based on changed files
+    if echo "$CHANGED_FILES" | grep -q "backend/"; then
+        PREFIX="backend:"
+    elif echo "$CHANGED_FILES" | grep -q "frontend/"; then
+        PREFIX="frontend:"
+    elif echo "$CHANGED_FILES" | grep -q "\.github\|\.gitea\|deploy\|docker"; then
+        PREFIX="deploy:"
+    else
+        PREFIX="chore:"
+    fi
+    
+    # Count files
+    FILE_COUNT=$(echo "$CHANGED_FILES" | wc -l | tr -d ' ')
+    
+    # Generate suggested message
+    if [ "$FILE_COUNT" -eq 1 ]; then
+        FILENAME=$(basename "$CHANGED_FILES")
+        SUGGESTED_MSG="$PREFIX update $FILENAME"
+    else
+        SUGGESTED_MSG="$PREFIX update $FILE_COUNT files"
+    fi
+    
+    # If message file is empty or has default template, add suggestion
+    if [ ! -s "$COMMIT_MSG_FILE" ] || ! grep -v '^#' "$COMMIT_MSG_FILE" | grep -q '[^[:space:]]'; then
+        echo "$SUGGESTED_MSG" > "$COMMIT_MSG_FILE"
+        echo "" >> "$COMMIT_MSG_FILE"
+        echo "# Suggested commit message generated based on changes" >> "$COMMIT_MSG_FILE"
+        echo "# Changed files:" >> "$COMMIT_MSG_FILE"
+        echo "$CHANGED_FILES" | sed 's/^/#   /' >> "$COMMIT_MSG_FILE"
+    fi
+fi