Few small fixes for the Website service (#23)

This PR contains the work done to address small fixes.

To provide further details:

* HTML template
  * Removed the duplicate charset <meta> tag from the Page protocol's head property.

* Router
  * Enabled auto-generated HEAD endpoints so every GET route gets a HEAD sibling. Uptime monitors and crawlers probing with HEAD now receive the page's status and headers instead of a 404.

* Docker
  * Pinned the asset optimizer versionsvia build args so minified output is reproducible for a given Dockerfile commit.
  * Narrowed the build context copied into the release stage, only package manifests and Swift sources are copied. Static assets come from the separate assets stage after the binary is built.
  * svgo now minifies all SVGs recursively rather than just icon.svg, and the staging step creates Resources/Static explicitly instead of conditionally moving the unminified sources.
  * Added curl to the runtime image (needed for the container healthcheck) and .claude to .dockerignore.

* Docker-compose
  * Added a `healthcheck` to the website service hitting GET /health (liveness only), so Compose reports process health without coupling container health to database reachability.

Reviewed-on: rock-n-code/loud-amsterdam#23
Co-authored-by: Javier Cicchelli <javier@rock-n-code.com>
Co-committed-by: Javier Cicchelli <javier@rock-n-code.com>

Services/Website/docker-compose.yml

@@ -31,3 +31,9 @@ services:
       DATABASE_USERNAME: ${DATABASE_USERNAME:-loud-ams}
       DATABASE_PASSWORD: ${DATABASE_PASSWORD:-}
       DATABASE_TLS: ${DATABASE_TLS:-require}
+    healthcheck:
+      test: ["CMD", "curl", "--fail", "--silent", "--show-error", "http://127.0.0.1:8080/health"]
+      interval: 30s
+      timeout: 5s
+      retries: 3
+      start_period: 10s