Created Actions workflow for nvim container build.

.gitea/workflows/neovim_container_docker_build.yml

@@ -4,11 +4,14 @@ name: Build and Push Docker Image
 on:
   push:
     branches:
+      - main
       - master
+    tags:
+      - "v*" # triggers when you push a tag like v1.0.0
     paths:
-      - "nvim/**"
+      - "**/Dockerfile"
 
-  workflow_dispatch:
+  workflow_dispatch: # manual run button
 
 jobs:
   build-and-push:
@@ -25,8 +28,8 @@ jobs:
         uses: docker/login-action@v3
         with:
           registry: gitea.example.com
-          username: ${{ secrets.USER }}
-          password: ${{ secrets.TOKEN }}
+          username: ${{ secrets.GITEA_USERNAME }}
+          password: ${{ secrets.GITEA_TOKEN }}
 
       - name: Extract Tag Name (if any)
         id: get_tag