[ImgBot] Optimize images (#2611)

*Total -- 168.18kb -> 123.83kb (26.37%)

/Website/docs/application/img/ping-monitor.png -- 90.86kb -> 50.61kb (44.31%)
/Website/static/img/undraw_server_cluster_jwwq.svg -- 5.70kb -> 4.93kb (13.48%)
/Website/static/img/undraw_server_down_s-4-lk.svg -- 6.93kb -> 6.24kb (10%)
/Website/static/img/undraw_personal_settings_re_i6w4.svg -- 7.72kb -> 7.05kb (8.74%)
/Website/static/img/undraw_secure_login_pdn4.svg -- 6.95kb -> 6.40kb (7.8%)
/Website/static/img/undraw_version_control_re_mg66.svg -- 11.67kb -> 10.93kb (6.32%)
/Website/static/img/undraw_connected_world_wuay.svg -- 34.58kb -> 33.90kb (1.95%)
/Website/static/img/logo.svg -- 3.78kb -> 3.78kb (0.21%)

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