Created Actions workflow for nvim container build.

.gitea/workflows/neovim_container_docker_build.yml

@@ -4,9 +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:
+      - "**/Dockerfile"
 
-  workflow_dispatch:
+  workflow_dispatch: # manual run button
 
 jobs:
   build-and-push:
@@ -22,9 +27,9 @@ jobs:
       - name: Log in to Gitea Container Registry
         uses: docker/login-action@v3
         with:
-          registry: gitea.setlock.net
-          username: ${{ secrets.USER }}
-          password: ${{ secrets.TOKEN }}
+          registry: gitea.example.com
+          username: ${{ secrets.GITEA_USERNAME }}
+          password: ${{ secrets.GITEA_TOKEN }}
 
       - name: Extract Tag Name (if any)
         id: get_tag