feat(apache2-foreground,Dockerfile-linux.template): Add support for TLS/HTTPS in Apache2, based on base64 files in ENV

[LordRobinCbz]

Description

This PR introduces a script enhancement to allow setting SSL certificates and keys directly from base64 encoded environment variables. This change is aimed at maintaining stateless environments in Docker/Kubernetes and securing communications.

Changes

• Set default SSL directory: ${APACHE_SSL_DIR:-/etc/apache2/ssl}
• Create the SSL directory if it doesn't exist.
• Decode and save the certificate and key from base64 encoded environment variables (APACHE_CERT_BASE64 and APACHE_KEY_BASE64).
• Update the Apache configuration to use the decoded certificate and key.
• Enable the SSL site configuration by creating a symbolic link.
• Set appropriate permissions for the certificate, key, and configuration files.
• Enable the SSL module in Apache.

Benefits

• Allows setting SSL certificates without the need for volume mounts, maintaining stateless environments.
• Enhances security by enabling TLS for PHP and Apache applications.
• Eliminates the need for SSL reverse proxies, simplifying the stack.

Tests done

Here one screen, of a working Apache2 server with HTTLS ready for hosting PHP application:

This is a major improvement as it secures entire stacks and is particularly beneficial for applications using PHP and Apache.

EDIT: I dont know how to edit the README to add new vars:

APACHE_SSL_DIR => string, not mandatory
APACHE_CERT_BASE64 => string
APACHE_KEY_BASE64 => string