docs: add notes about runtime bootstrapping of option 2

[reubenmiller]

Add section to walk users through bootstrapping the container at runtime (rather than requiring them to configure the container via once-off containers that re-use the shared volumes).

[github-actions]

Robot Results

✅ Passed	❌ Failed	⏭️ Skipped	Total	Pass %	⏱️ Duration
19	0	1	19	100	8m10.358909s

Passed Tests

Name	⏱️ Duration	Suite
Ignore Containers Marked With A Specific Label	27.932 s	Container
Grace period to allow container to startup	5.028 s	Operations
Service is up	0.134 s	Operations
Get Logfile Request	2.355 s	Operations
Get Configuration File	4.683 s	Operations
Execute Shell Command	2.353 s	Operations
Install application using docker compose	13.222 s	Operations
Get Container Logs	2.355 s	Operations
Get Container Logs without explicit container name	4.454 s	Operations
Get Container Logs For Non-existent container	2.354 s	Operations
Update From Legacy Versions	138.770 s	Self-Update-Compat
Trigger self update via local command	26.028 s	Self-Update
Self update should only update if there is a new image	20.687 s	Self-Update
Self update using software update operation	106.080 s	Self-Update
Rollback when trying to install a non-tedge based image	22.225 s	Self-Update
Self update using software update operation using Container type	108.830 s	Self-Update
Cloud Connection is Online	0.151 s	Telemetry
Service status	0.239 s	Telemetry
Sends measurements	2.449 s	Telemetry