Code Complete Ch7. High-Quality Routines (continued)
高质量例程，一说设计，二说实现。设计要考虑是否内聚， “Functional cohesion is the strongest and best kind of cohesion, occurring when a routine performs one and only one operation.” [TODO] 其余几种 cohesion. 实现，则有变量名、参数、语句等可讨论。暂略。
dogdata
Backend multi-stage.
完成 Docker 安装 InfluxDB.
datadog-agent 的容器化 build, WIP.