Add Dockerfile

Dockerfile

@@ -0,0 +1,24 @@
+FROM python:3.12-slim
+  RUN pip install docker prometheus-client
+  COPY docker-exporter.py .                                                                                         
+  CMD ["python", "docker-exporter.py"]                                                                              
+                                                                                                             
+  .gitea/workflows/build.yml:                                                                                
+  name: Build                                                                                                
+  on:             
+    push:                                                                                                    
+      branches: [main]
+  jobs:                                                                                                      
+    build:        
+      runs-on: ubuntu-latest
+      steps:                
+        - uses: actions/checkout@v4
+        - uses: docker/login-action@v3
+          with:                                                                                              
+            registry: 192.168.31.100:3847                                                                    
+            username: ${{ gitea.actor }}                                                                     
+            password: ${{ secrets.GITEA_TOKEN }}                                                             
+        - uses: docker/build-push-action@v5                                                                  
+          with:                                                                                              
+            push: true                                                                                       
+            tags: 192.168.31.100:3847/${{ gitea.repository }}:latest