update readme, add prepare for sever env

huangmingming

2023-01-30 4884cacde01ccbdda21639b439132dc4a741a5bf

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beam_size: 10
penalty: 0.0
maxlenratio: 0.0
minlenratio: 0.0
ctc_weight: 1.0
lm_weight: 0.7