fix(ci): update k6 installation script to support multiple architectures

- Modified the k6 installation script in the Gitea CI workflow to dynamically select the appropriate binary for linux-amd64 or linux-arm64 based on the system architecture.
- Updated README.md to reflect the changes in architecture handling for k6 installation, providing clearer guidance for users on different platforms.

.gitea/workflows/test.yml

@@ -157,9 +157,16 @@ jobs:
         run: |
           set -e
           K6_VER="v0.55.0"
-          curl -sSL "https://github.com/grafana/k6/releases/download/${K6_VER}/k6-${K6_VER}-linux-amd64.tar.gz" -o /tmp/k6.tgz
+          ARCH=$(uname -m)
+          case "$ARCH" in
+            x86_64) K6_ARCH=amd64 ;;
+            aarch64|arm64) K6_ARCH=arm64 ;;
+            *) echo "k6: unbekannte Architektur: $ARCH"; exit 1 ;;
+          esac
+          echo "Installing k6 ${K6_VER} linux-${K6_ARCH}"
+          curl -sSL "https://github.com/grafana/k6/releases/download/${K6_VER}/k6-${K6_VER}-linux-${K6_ARCH}.tar.gz" -o /tmp/k6.tgz
           tar -xzf /tmp/k6.tgz -C /tmp
-          sudo mv "/tmp/k6-${K6_VER}-linux-amd64/k6" /usr/local/bin/k6
+          sudo mv "/tmp/k6-${K6_VER}-linux-${K6_ARCH}/k6" /usr/local/bin/k6
           k6 version
 
       - name: k6 Health-Baseline (parallele /health)

scripts/load/README.md

@@ -21,7 +21,7 @@ k6 run scripts/load/k6-health-baseline.js
 BASE_URL=https://dev.shinkan.jinkendo.de k6 run scripts/load/k6-health-baseline.js
 ```
 
-Wenn `BASE_URL` fehlt, nutzt das Skript die Default-URL im Script (anpassen bei Bedarf).
+**Architektur:** Der Workflow lädt **linux-amd64** oder **linux-arm64** je nach `uname -m` (z. B. Gitea-Runner auf Raspberry Pi 5).
 
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