fix(build): refactor docker install script

[motunrayokoyejo]

Added/expanded install-local.sh to provide a smoother first-time local setup flow.
Installer now validates prerequisites (git, curl, docker, docker compose, Docker daemon).
Added robust repo setup handling

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Note

Low Risk
Changes are limited to the local install script and gitignore; no runtime application or auth paths are modified.

Overview
Local Docker install no longer hard-fails when default ports are taken. install-local.sh picks HTTP, Postgres, and PgBouncer host ports from env (CONVOY_HTTP_PORT, etc.), falls back to free ports when needed, and warns instead of exiting.

It writes configs/local/docker-compose.install.generated.yml by substituting the standard publish mappings from the base compose file, patches configs/local/convoy.json host to match the chosen URL, and runs health checks and next-step hints against that URL. .gitignore now excludes the generated compose file and a legacy override path.

Warnings and errors go to stderr; stale override files from older installers are removed on run.

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Current version of PR was reviewed by /review-bugbot on Jul 27, 12:53 GMT+1. It flagged 0 findings.

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