fix: dependencies in workflow

.github/workflows/docker.yml

@@ -25,6 +25,14 @@ jobs:
       with:
         go-version-file: go.mod
 
+    - name: Install libvips
+      run: |
+        sudo apt-get update
+        sudo apt-get install -y libvips-dev
+
+    - name: Verify libvips install
+      run: vips --version
+
     - name: Build
       run: go build -v ./...