fix file path

Author: Satont

Diff for: .github/workflows/prometheus.yml

@@ -7,8 +7,8 @@ on:
   workflow_dispatch:
 
 jobs:
-  build-and-push:
-    runs-on: ubuntu-latest
+  build-and-push-prometheus:
+    runs-on: self-hosted
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -27,7 +27,8 @@ jobs:
         with:
           context: .
           platforms: linux/amd64,linux/arm64
+          file: ./prometheus/Dockerfile
           push: true
           tags: twirapp/prometheus:latest
           cache-from: type=gha,scope=twir-prometheus
-          cache-to: type=gha,mode=max,scope=twir-prometheus
+          cache-to: type=gha,mode=max,scope=twir-prometheus