Precautions for H5 to package APP with HBuilder

Vue was packaged into APP with HBuilder and encountered a lot of pits, record it.

1. The routing mode cannot be History mode.

2. All the image addresses cannot be used as paths such as "/img/xxx.png", they should be changed to relative paths such as "./assets/img/xxx.png"

3. If the server configuration is judged by the domain name, remember to change it to a hard-coded configuration, and use a different configuration for the test and the formal one.