update frontend

static/images/2fa/jupyter-jsc_2fa_img01.png

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static/images/2fa/jupyter-jsc_2fa_img04-1.png

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static/images/2fa/jupyter-jsc_2fa_short_img01.png

static/images/2fa/jupyter-jsc_2fa_short_img02.png

static/images/footer/systems/deep.svg

static/images/footer/systems/jedi.svg

static/images/footer/systems/jsccloud.svg

static/images/footer/systems/jupyter.svg

static/images/footer/systems/jureca.svg

static/images/footer/systems/jusuf.svg

static/images/footer/systems/juwels.svg

static/images/pages/2FA/img01.png

static/images/pages/2FA/img03.png

static/images/pages/2FA/jupyter-jsc_2fa_img01.png

static/images/pages/2FA/jupyter-jsc_2fa_img02.png