chore: update architecture documentation guidelines and adjust E2E Docker configuration

.github/instructions/copilot-instructions.md

@@ -5,6 +5,12 @@
 Every session should improve the codebase, not just add to it. Actively refactor code you encounter, even outside of your immediate task scope. Think about long-term maintainability and consistency. Make a detailed plan before writing code. Always create unit tests for new code coverage.
 
 - **MANDATORY**: Read all relevant instructions in `.github/instructions/` for the specific task before starting.
+- **ARCHITECTURE AWARENESS**: Always consult `ARCHITECTURE.md` at the repository root before making significant changes to:
+  - Core components (Backend API, Frontend, Caddy Manager, Security layers)
+  - System architecture or data flow
+  - Technology stack or dependencies
+  - Deployment configuration
+  - Directory structure or file organization
 - **DRY**: Consolidate duplicate patterns into reusable functions, types, or components after the second occurrence.
 - **CLEAN**: Delete dead code immediately. Remove unused imports, variables, functions, types, commented code, and console logs.
 - **LEVERAGE**: Use battle-tested packages over custom implementations.
@@ -101,6 +107,13 @@ Before proposing ANY code change or fix, you must build a mental map of the feat
 
 ## Documentation
 
+- **Architecture**: Update `ARCHITECTURE.md` when making changes to:
+  - System architecture or component interactions
+  - Technology stack (major version upgrades, library replacements)
+  - Directory structure or organizational conventions
+  - Deployment model or infrastructure
+  - Security architecture or data flow
+  - Integration points or external dependencies
 - **Features**: Update `docs/features.md` when adding capabilities. This is a short "marketing" style list. Keep details to their individual docs.
 - **Links**: Use GitHub Pages URLs (`https://wikid82.github.io/charon/`) for docs and GitHub blob links for repo files.
 

.github/instructions/update-docs-on-code-change.instructions.md

@@ -107,6 +107,15 @@ Automatically check if documentation updates are needed when:
 - Installation or setup procedures change
 - Command-line interfaces or scripts are updated
 - Code examples in documentation become outdated
+- **ARCHITECTURE.md must be updated when:**
+  - System architecture or component interactions change
+  - New components are added or removed
+  - Technology stack changes (major version upgrades, library replacements)
+  - Directory structure or organizational conventions change
+  - Deployment model or infrastructure changes
+  - Security architecture or data flow changes
+  - Integration points or external dependencies change
+  - Development workflow or testing strategy changes
 
 ## Documentation Update Rules
 
@@ -219,6 +228,7 @@ If `apply-doc-file-structure == true`, then apply the following configurable ins
 Maintain these documentation files and update as needed:
 
 - **README.md**: Project overview, quick start, basic usage
+- **ARCHITECTURE.md**: System architecture, component design, technology stack, data flow
 - **CHANGELOG.md**: Version history and user-facing changes
 - **docs/**: Detailed documentation
   - `installation.md`: Setup and installation guide

.github/skills/docker-rebuild-e2e-scripts/run.sh

@@ -21,8 +21,8 @@ source "${SKILLS_SCRIPTS_DIR}/_environment_helpers.sh"
 PROJECT_ROOT="$(cd "${SCRIPT_DIR}/../../.." && pwd)"
 
 # Docker compose file for Playwright E2E tests
-COMPOSE_FILE=".docker/compose/docker-compose.playwright-ci.yml"
-CONTAINER_NAME="charon-playwright"
+COMPOSE_FILE=".docker/compose/docker-compose.playwright-local.yml"
+CONTAINER_NAME="charon-e2e"
 IMAGE_NAME="charon:local"
 HEALTH_TIMEOUT=60
 HEALTH_INTERVAL=5