compose watch documentation missing common issues

[Maciej (Matt) Wakuła]

What is the problem you're trying to solve
I spent a lot of effort to troubleshoot errors:

• "Error handling changed files for service : no such directory"
• "tar: Substituting `.' for empty member name"
• "tar: .: Cannot open: File exists"
• "tar: Exiting with failure status due to previous errors"

The errors are not indicating actual problem.

Describe the solution you'd like

• Add a list of common problems
• Validate that all the parameters are specified (in my case there was no "target" in "develop.watch[]" and refuse to watch if critical elements are missing
• Fix the implementation to separate existing actions "rebuild", "sync+restart" and "sync"
• Add new actions "restart" (only restart container on change) and "recreate" (pull the image and recreate container)

Additional context
#418