docs: add a readme for the docs folder

docs/README.md

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+# Dokku Documentation
+
+This documentation covers the installation, configuration, and usage of Dokku - a Docker-powered PaaS that provides a Heroku-like experience.
+
+## Getting Started
+
+- [Installation](getting-started/installation/index.md) - Install Dokku on your server
+  - [Debian](getting-started/install/debian.md)
+  - [Docker](getting-started/install/docker.md)
+  - [DigitalOcean](getting-started/install/digitalocean.md)
+  - [Azure](getting-started/install/azure.md)
+  - [DreamHost](getting-started/install/dreamhost.md)
+  - [Vagrant](getting-started/install/vagrant.md)
+- [Advanced Installation](getting-started/advanced-installation.md) - Custom installation options
+- [Upgrading](getting-started/upgrading/index.md) - Upgrade to newer Dokku versions
+- [Uninstalling](getting-started/uninstalling.md) - Remove Dokku from your server
+- [Troubleshooting](getting-started/troubleshooting.md) - Common issues and solutions
+- [Where to Get Help](getting-started/where-to-get-help.md) - Support resources
+
+## Deployment
+
+- [Application Deployment](deployment/application-deployment.md) - Deploy your first app
+- [Application Management](deployment/application-management.md) - Manage deployed applications
+- [Logs](deployment/logs.md) - View application logs
+- [Remote Commands](deployment/remote-commands.md) - Run commands remotely
+- [User Management](deployment/user-management.md) - Manage SSH access
+- [Zero Downtime Deploys](deployment/zero-downtime-deploys.md) - Deploy without interruption
+
+### Deployment Methods
+
+- [Git](deployment/methods/git.md) - Deploy via git push
+- [Archive](deployment/methods/archive.md) - Deploy from tar/zip archives
+- [Image](deployment/methods/image.md) - Deploy from Docker images
+
+### Builders
+
+- [Builder Management](deployment/builders/builder-management.md) - Configure build systems
+- [Buildpack Management](deployment/builders/buildpack-management.md) - Manage buildpack settings
+- [Herokuish Buildpacks](deployment/builders/herokuish-buildpacks.md) - Heroku-compatible buildpacks
+- [Cloud Native Buildpacks](deployment/builders/cloud-native-buildpacks.md) - CNB support
+- [Dockerfiles](deployment/builders/dockerfiles.md) - Build from Dockerfile
+- [Nixpacks](deployment/builders/nixpacks.md) - Nixpacks builder
+- [Railpack](deployment/builders/railpack.md) - Railpack builder
+- [Lambda](deployment/builders/lambda.md) - Lambda-style functions
+- [Null Builder](deployment/builders/null.md) - Skip the build phase
+
+### Schedulers
+
+- [Scheduler Management](deployment/schedulers/scheduler-management.md) - Configure schedulers
+- [Docker Local](deployment/schedulers/docker-local.md) - Default Docker scheduler
+- [K3s](deployment/schedulers/k3s.md) - Lightweight Kubernetes
+- [Kubernetes](deployment/schedulers/kubernetes.md) - External Kubernetes clusters
+- [Nomad](deployment/schedulers/nomad.md) - HashiCorp Nomad
+- [Null Scheduler](deployment/schedulers/null.md) - Skip scheduling
+
+### Continuous Integration
+
+- [Generic CI](deployment/continuous-integration/generic.md) - General CI/CD setup
+- [GitHub Actions](deployment/continuous-integration/github-actions.md)
+- [GitLab CI](deployment/continuous-integration/gitlab-ci.md)
+- [Woodpecker CI](deployment/continuous-integration/woodpecker-ci.md)
+
+## Configuration
+
+- [Environment Variables](configuration/environment-variables.md) - Configure app environment
+- [Domains](configuration/domains.md) - Custom domain management
+- [SSL/TLS](configuration/ssl.md) - HTTPS and certificates
+
+## Networking
+
+- [Proxy Management](networking/proxy-management.md) - Reverse proxy configuration
+- [Port Management](networking/port-management.md) - Port mapping and exposure
+- [DNS](networking/dns.md) - DNS configuration
+- [Network](networking/network.md) - Docker network management
+
+### Proxies
+
+- [Nginx](networking/proxies/nginx.md) - Default proxy
+- [Caddy](networking/proxies/caddy.md)
+- [HAProxy](networking/proxies/haproxy.md)
+- [Traefik](networking/proxies/traefik.md)
+- [OpenResty](networking/proxies/openresty.md)
+
+## Processes
+
+- [Process Management](processes/process-management.md) - Scale and manage processes
+- [Scheduled Cron Tasks](processes/scheduled-cron-tasks.md) - Scheduled jobs
+- [One-off Tasks](processes/one-off-tasks.md) - Run one-time commands
+- [Entering Containers](processes/entering-containers.md) - Access running containers
+
+## Advanced Usage
+
+- [Persistent Storage](advanced-usage/persistent-storage.md) - Mount volumes
+- [Docker Options](advanced-usage/docker-options.md) - Custom Docker run arguments
+- [Resource Management](advanced-usage/resource-management.md) - CPU and memory limits
+- [Plugin Management](advanced-usage/plugin-management.md) - Install and manage plugins
+- [Registry Management](advanced-usage/registry-management.md) - Docker registry integration
+- [Repository Management](advanced-usage/repository-management.md) - Git repository settings
+- [Deployment Tasks](advanced-usage/deployment-tasks.md) - Pre/post deploy hooks
+- [Event Logs](advanced-usage/event-logs.md) - Dokku event history
+- [Backup and Recovery](advanced-usage/backup-recovery.md) - Data backup strategies
+
+## Development
+
+- [Plugin Creation](development/plugin-creation.md) - Build custom plugins
+- [Plugin Triggers](development/plugin-triggers.md) - Available plugin hooks
+- [Testing](development/testing.md) - Test Dokku and plugins
+- [Release Process](development/release-process.md) - How Dokku releases work
+
+## Community
+
+- [Plugins](community/plugins.md) - Community-maintained plugins
+- [Clients](community/clients.md) - API clients and tools
+
+## Enterprise
+
+- [Dokku Pro](enterprise/pro.md) - Commercial features and support
+
+## Appendices
+
+### Migration Guides
+
+- [0.37.0](appendices/0.37.0-migration-guide.md)
+- [0.36.0](appendices/0.36.0-migration-guide.md)
+- [0.35.0](appendices/0.35.0-migration-guide.md)
+- [0.34.0](appendices/0.34.0-migration-guide.md)
+- [0.33.0](appendices/0.33.0-migration-guide.md)
+- [0.32.0](appendices/0.32.0-migration-guide.md)
+- [0.31.0](appendices/0.31.0-migration-guide.md)
+- [0.30.0](appendices/0.30.0-migration-guide.md)
+- [0.29.0](appendices/0.29.0-migration-guide.md)
+- [0.28.0](appendices/0.28.0-migration-guide.md)
+- [0.27.0](appendices/0.27.0-migration-guide.md)
+- [0.26.0](appendices/0.26.0-migration-guide.md)
+- [0.25.0](appendices/0.25.0-migration-guide.md)
+- [0.24.0](appendices/0.24.0-migration-guide.md)
+- [0.23.0](appendices/0.23.0-migration-guide.md)
+- [0.22.0](appendices/0.22.0-migration-guide.md)
+- [0.21.0](appendices/0.21.0-migration-guide.md)
+- [0.20.0](appendices/0.20.0-migration-guide.md)
+- [0.10.0](appendices/0.10.0-migration-guide.md)
+- [0.9.0](appendices/0.9.0-migration-guide.md)
+- [0.8.0](appendices/0.8.0-migration-guide.md)
+- [0.7.0](appendices/0.7.0-migration-guide.md)
+- [0.6.0](appendices/0.6.0-migration-guide.md)
+- [0.5.0](appendices/0.5.0-migration-guide.md)
+
+### File Formats
+
+- [app.json](appendices/file-formats/app-json.md) - Application configuration
+- [Procfile](appendices/file-formats/procfile.md) - Process definitions
+- [Dockerfile](appendices/file-formats/dockerfile.md) - Docker build instructions
+- [.buildpacks](appendices/file-formats/buildpacks-file.md) - Buildpack configuration
+- [project.toml](appendices/file-formats/project-toml.md) - CNB configuration
+- [nixpacks.toml](appendices/file-formats/nixpacks-toml.md) - Nixpacks configuration
+- [railpack.json](appendices/file-formats/railpack-json.md) - Railpack configuration
+- [lambda.yml](appendices/file-formats/lambda-yml.md) - Lambda configuration
+- [nginx.conf.sigil](appendices/file-formats/nginx-conf-sigil.md) - Nginx template customization