CDS archive specific configuration

[romain-grecourt]

Provide CDS specific parameters:

• cdsJvmOptions
• cdsArgs
• cdsDebugOptions

---

helidon:jlink-image requires the working directory to be the -jri directory, this is an issue when the application code relies on the working directory to be the project directory.

E.g.

• Using config files relative the project directory
• Using static content directory as path (not resource) relative to the project directory

---

When building the CDS archive, the application is started with the -jri directory as the working directory, thus the relative paths are broken.

The application can work-around it by using configuration to control the static path.
E.g.

Path web = config.get("app.static.path")
        .as(Path.class)
        .orElseGet(() -> Paths.get("web"));

However this requires passing -Dapp.static.path="../../web" as a JVM option as part of the CDS archive start.

Currently the only way to do this is by using: jlink.image.defaultJvmOptions, but this also hard-codes it as a default for the application.

---

Ideally we'd have ways to have different values for the CDS archive startup and the actual hard-coded default.

During the build the JRI directory is target/helidon-quickstart-se-ri/ thus the relative path to the project directory is ../.. which is not a nice default value.

Ideally you'd have the relative path as .., E.g.

|- config/prod.yaml
|- web/
|- helidon-quickstart-se-ri