Docker compose configuration file writing precautions and common parameters

YAML data structures are represented by indentation, consecutive items are represented by minus signs, key-value pairs are separated by colons, arrays are enclosed in square brackets, and hashes are
enclosed .
Notes on YAML file format:

1. Tab key indentation is not supported, space indentation is required
2. Usually indent 2 spaces at the beginning
3. Indent 1 space after characters, such as colons, commas, bars
4. Annotate with a pound sign
5. If it contains special characters, enclose it in single quotes
6. Boolean values ​​(true, false, yes, no, on, off) must be enclosed in quotes so that the parser will interpret them as
   strings