Write a rapid prototyping playbook for building a portfolio website using Rust + Actix. Prioritize shipping over perfection. Use a {{tone}} tone. Target {{target_audience}}. Consider {{industry}} context and {{time_constraint}} of AI-assisted coding. Structure the playbook with: Overview, Prerequisites, Step-by-step Plays, Metrics to Track, and Troubleshooting Guide. Keep under 1500 words. Every recommendation must be specific to {{industry}} and {{target_audience}}. Use plain language. If a data point cannot be confirmed, skip that section. The playbook must be actionable and immediately executable. Paste any relevant background information after these instructions before running.