Major updates: Setup environment, database, permissions and admin access

- Created virtual environment and installed requirements
- Set up MariaDB database with user 'sa' and database 'recticel'
- Created order_for_labels table for printing functionality
- Implemented role-based permissions system with admin role
- Added admin access to print label modules and etichete functionality
- Fixed template routing issues in main_page_etichete.html
- Updated app to run on port 8781 with network access (0.0.0.0)
- Added systemd service file for background deployment
- Created installation documentation

to_do_install.txt

@@ -0,0 +1,27 @@
+
+# Steps to Prepare Environment for Installing Python Requirements
+
+1. Change ownership of the project directory (if needed):
+	sudo chown -R $USER:$USER /home/ske087/quality_recticel
+
+2. Install Python venv module:
+	sudo apt install -y python3-venv
+
+3. Create and activate the virtual environment:
+	python3 -m venv recticel
+	source recticel/bin/activate
+
+4. Install MariaDB server and development libraries:
+	sudo apt install -y mariadb-server libmariadb-dev
+
+5. Create MariaDB database and user:
+	sudo mysql -e "CREATE DATABASE recticel; CREATE USER 'sa'@'localhost' IDENTIFIED BY '12345678'; GRANT ALL PRIVILEGES ON recticel.* TO 'sa'@'localhost'; FLUSH PRIVILEGES;"
+
+6. Install build tools (for compiling Python packages):
+	sudo apt install -y build-essential
+
+7. Install Python development headers:
+	sudo apt install -y python3-dev
+
+8. Install Python requirements:
+	pip install -r py_app/requirements.txt