Wiki: Docker: Database passwords with two exclamation points create invalid `config.yml`

[axisofentropy]

Describe the bug
The wiki.js container image doesn't seem to tolerate database passwords that have two exclamation points. It seems to generate a config.yml file that is not valid YAML. Here's an example error message:

undeclared tag handle "!rE!" at line 8, column 25:
      pass: !rE!z-pzjvFKuVOu
                            ^
>>> Unable to read configuration file! Did you create the config.yml file?

To Reproduce

1. Start a Docker container using the requarks/wiki image and specifying the environment variable DB_PASS with value that includes two exclamation points. You may or may not need to specify other database connection environment variables.
2. Observe error in container logs.

Expected behavior
I expected the container to establish a database connection after constructing a valid config.yml file.

Host Info (please complete the following information):

• OS: Google Kubernetes Engine, Rapid Release Channel, probably 1.17.8-gke.17
• Wiki.js version: Probably Docker tag canary-2.5.90
• Database engine: Postgres 9 or 11, not sure

Additional context
Maybe just putting quotes around this value (and all others from environment variables!) within the YAML would fix this?

[Smankusors]

Maybe just putting quotes around this value (and all others from environment variables!) within the YAML would fix this?

You... haven't tried this?

[NGPixel]

You... haven't tried this?

He mentioned Docker env, which is set internally.

[ptts]

I'm pretty sure the issue is the _leading_ ! and not the fact that it contains two !. Take a look at the YAML specification about node tags. Either quoting the password or not leading with an ! should work.

[NGPixel]

Fixed by 29afc61abf6fbd6d09886ac7952b2e78c98633be