[ImgBot] Optimize images

*Total -- 4,755.01kb -> 3,089.00kb (35.04%)

/_static/basic/source/iterm.png -- 152.92kb -> 56.73kb (62.9%)
/_static/basic/osx/3.png -- 164.59kb -> 63.92kb (61.16%)
/_static/experience/design/flow.png -- 30.01kb -> 12.21kb (59.3%)
/_static/experience/project/sys.png -- 11.12kb -> 4.68kb (57.86%)
/_static/basic/js/fetch.png -- 237.70kb -> 106.31kb (55.28%)
/_static/experience/design/seq.png -- 35.61kb -> 17.28kb (51.49%)
/_static/experience/project/flow.png -- 30.97kb -> 15.12kb (51.16%)
/_static/experience/design/use-case.png -- 31.55kb -> 16.35kb (48.17%)
/_static/basic/osx/4.png -- 373.51kb -> 209.28kb (43.97%)
/_static/basic/travis/06.01.png -- 104.38kb -> 58.74kb (43.73%)
/_static/basic/travis/06.00.png -- 126.69kb -> 74.54kb (41.16%)
/_static/experience/design/tip.png -- 83.65kb -> 50.64kb (39.45%)
/_static/experience/operation/workflow1.png -- 129.04kb -> 79.15kb (38.66%)
/_static/basic/travis/04.02.png -- 200.40kb -> 126.08kb (37.09%)
/_static/experience/operation/rollback.png -- 191.06kb -> 120.61kb (36.87%)
/_static/experience/operation/restarter1.png -- 66.72kb -> 43.24kb (35.19%)
/_static/experience/project/test.png -- 44.26kb -> 29.00kb (34.48%)
/_static/basic/osx/2.png -- 320.73kb -> 210.37kb (34.41%)
/_static/experience/operation/workflow2.png -- 124.41kb -> 81.76kb (34.28%)
/_static/basic/osx/1.png -- 310.74kb -> 204.71kb (34.12%)
/_static/experience/operation/workflow4-2.png -- 165.57kb -> 109.56kb (33.83%)
/_static/basic/travis/05.02.png -- 183.42kb -> 123.08kb (32.9%)
/_static/experience/operation/workflow3-1.png -- 184.94kb -> 129.39kb (30.04%)
/_static/experience/design/er.png -- 41.81kb -> 29.92kb (28.43%)
/_static/basic/ss/image7.png -- 43.38kb -> 31.08kb (28.37%)
/_static/basic/travis/04.01.png -- 29.45kb -> 21.19kb (28.04%)
/_static/experience/design/chart.png -- 52.04kb -> 37.71kb (27.54%)
/_static/experience/operation/workflow3-2.png -- 186.62kb -> 135.96kb (27.15%)
/_static/basic/ss/image10.png -- 22.58kb -> 16.59kb (26.52%)
/_static/basic/ss/image5.png -- 20.52kb -> 15.12kb (26.29%)
/_static/experience/design/system.png -- 121.31kb -> 89.88kb (25.91%)
/_static/basic/http.jpg -- 13.70kb -> 10.21kb (25.48%)
/_static/basic/ss/image1.png -- 16.70kb -> 12.54kb (24.94%)
/_static/basic/travis/05.00.png -- 43.91kb -> 33.33kb (24.09%)
/_static/basic/travis/05.03.png -- 68.11kb -> 53.21kb (21.87%)
/_static/basic/db/mysql.png -- 192.59kb -> 151.13kb (21.53%)
/_static/basic/ss/image9.png -- 13.15kb -> 10.34kb (21.36%)
/_static/experience/operation/restarter2.png -- 119.64kb -> 95.55kb (20.14%)
/_static/experience/operation/workflow4-1.png -- 23.93kb -> 19.24kb (19.6%)
/_static/basic/travis/05.01.png -- 181.13kb -> 147.04kb (18.82%)
/_static/basic/ss/image6.png -- 4.45kb -> 3.64kb (18.15%)
/_static/basic/ss/image3.png -- 10.04kb -> 8.23kb (17.98%)
/_static/basic/ss/image11.png -- 10.90kb -> 9.13kb (16.27%)
/_static/basic/ss/image8.png -- 9.64kb -> 8.11kb (15.87%)
/_static/basic/ss/image2.png -- 10.06kb -> 8.80kb (12.52%)
/_static/experience/operation/workflow3-3.png -- 10.10kb -> 8.89kb (11.94%)
/_static/experience/design/mind.png -- 131.41kb -> 115.94kb (11.77%)
/_static/experience/graphql/dataloader.png -- 37.29kb -> 36.89kb (1.07%)
/_static/mind/team/maslows.jpg -- 36.59kb -> 36.59kb (0.01%)