Enhance Docker and Build Configuration

- Added support for build arguments in Dockerfile to specify UID, GID, version, build time, and commit hash.
- Updated docker-compose.yaml to utilize UID and GID for non-root user execution, improving file permission handling.
- Introduced entrypoint.sh script to manage user permissions and environment setup at container startup.
- Enhanced application logging to include version information during startup.
- Updated README with new instructions for running the application with specific user IDs and environment variables.

entrypoint.sh

@@ -0,0 +1,89 @@
+#!/bin/sh
+set -e
+
+# Default username
+USERNAME=${USERNAME:-gomft}
+
+# If PUID/PGID env vars are set, update the user's UID/GID
+if [ -n "${PUID}" ] && [ -n "${PGID}" ]; then
+    echo "🔒 Updating user ${USERNAME} with UID:GID = ${PUID}:${PGID}"
+    
+    # Make sure we have directories to work with
+    mkdir -p /app/data /app/backups
+    
+    # Check if we're on Alpine (busybox)
+    if grep -q "Alpine" /etc/os-release 2>/dev/null; then
+        echo "Detected Alpine Linux, using busybox usermod/groupmod..."
+        
+        # Update group ID first
+        if [ "$(getent group ${USERNAME} | cut -d: -f3)" != "${PGID}" ]; then
+            echo "Updating GID to ${PGID}..."
+            groupmod -g ${PGID} ${USERNAME} || echo "⚠️ Failed to change GID"
+        fi
+        
+        # Update user ID
+        if [ "$(id -u ${USERNAME})" != "${PUID}" ]; then
+            echo "Updating UID to ${PUID}..."
+            usermod -u ${PUID} ${USERNAME} || echo "⚠️ Failed to change UID"
+        fi
+    else
+        echo "Non-Alpine system, using standard user management..."
+        # Handle user/group changes with error recovery
+        {
+            # First remove the user (since user has the group as primary group)
+            if getent passwd ${USERNAME} > /dev/null; then
+                echo "Removing existing user ${USERNAME}"
+                userdel ${USERNAME} 2>/dev/null || true
+            fi
+            
+            # Wait a moment for system to clean up user
+            sleep 1
+            
+            # Then remove the group
+            if getent group ${USERNAME} > /dev/null; then
+                echo "Removing existing group ${USERNAME}"
+                groupdel ${USERNAME} 2>/dev/null || true
+            fi
+            
+            # Recreate group and user in the correct order
+            echo "Creating group ${USERNAME} with GID ${PGID}"
+            groupadd -g ${PGID} ${USERNAME} 2>/dev/null || groupadd ${USERNAME} 2>/dev/null || true
+            
+            echo "Creating user ${USERNAME} with UID ${PUID}"
+            useradd -u ${PUID} -g ${USERNAME} -s /bin/sh ${USERNAME} 2>/dev/null || 
+            useradd -g ${USERNAME} -s /bin/sh ${USERNAME} 2>/dev/null || true
+        } || {
+            echo "⚠️ Warning: Failed to update UID/GID, continuing with built-in user"
+        }
+    fi
+    
+    # Fix ownership of app directories
+    echo "Setting ownership of app directories"
+    chown -R ${USERNAME}:${USERNAME} /app/data /app/backups || echo "⚠️ Warning: Failed to change ownership"
+    
+    # Ensure .env file exists and has correct permissions
+    if [ -f /app/.env ]; then
+        echo "Found .env file, setting permissions..."
+        chown ${USERNAME}:${USERNAME} /app/.env || echo "⚠️ Warning: Failed to change .env ownership"
+        chmod 644 /app/.env || echo "⚠️ Warning: Failed to change .env permissions"
+    else
+        echo "No .env file found, creating empty one..."
+        touch /app/.env
+        chown ${USERNAME}:${USERNAME} /app/.env || echo "⚠️ Warning: Failed to change .env ownership"
+        chmod 644 /app/.env || echo "⚠️ Warning: Failed to change .env permissions"
+    fi
+    
+    # Run the application as the specified user
+    echo "Starting application as user ${USERNAME}"
+    if command -v su-exec >/dev/null 2>&1; then
+        exec su-exec ${USERNAME} "$@"
+    elif command -v gosu >/dev/null 2>&1; then
+        exec gosu ${USERNAME} "$@"
+    else
+        exec su -m ${USERNAME} -c "$*"
+    fi
+else
+    # Run as the predefined user (set during build)
+    echo "Starting application with predefined user"
+    exec "$@"
+fi