Skip TLS check and document docker environment variables

[Tlepel]

No description provided.

[Copilot]

Pull Request Overview

This PR adds support for skipping TLS verification when testing SCIM servers with self-signed certificates and improves documentation of Docker environment variables.

• Adds skipTlsVerification configuration option to bypass SSL certificate validation
• Documents all environment variables in Docker documentation with a proper table
• Updates code formatting from ~~~ to standard ```` markdown blocks

Reviewed Changes

Copilot reviewed 5 out of 6 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
src/helpers.js	Adds HTTPS agent configuration to skip TLS verification when enabled
site/docker/index.md	Documents environment variables and updates markdown formatting
server.js	Sets default value for SKIP_TLS_VERIFICATION environment variable
scim.test.js	Adds skipTlsVerification configuration from environment variable
README.md	Documents new --skip-tls-verification command line option

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