feat: adjust sample to mvp (#1)

Reviewed-on: #1
Co-authored-by: Timo Behrendt <t.behrendt@t00n.de>
Co-committed-by: Timo Behrendt <t.behrendt@t00n.de>

.gitea/actions/go-cache-key/action.yaml

@@ -0,0 +1,16 @@
+name: Go Cache Key
+description: Create a cache key for Go dependencies
+
+outputs:
+  hash:
+    description: The cache key for Go dependencies
+    value: ${{ steps.hash-go.outputs.hash }}
+
+runs:
+  using: composite
+  steps:
+    - name: Create cache key
+      shell: bash
+      id: hash-go
+      run: |
+        echo "hash=$(sha256sum go.mod go.sum | sha256sum | cut -d' ' -f1)" >> "$GITHUB_OUTPUT"