FIRST_INSTALL in the document root of your web server.
                                New to TYPO3? We recommend reading the
                                Getting Started Documentation.
                            ENABLE_INSTALL_TOOL in the directory {enableInstallToolPath}.
                            Either file must be writable by the web server user. The filename is case-sensitive. The file can be empty.
                            Security note:
                            When you are finished with your task, you should rename or delete any FIRST_INSTALL
                            and ENABLE_INSTALL_TOOL files. They will automatically be deleted if you log out of
                            the Install Tool or if the file is older than one hour.