Add Docker workflow

Author: ben221199

.github/workflows/docker-image.yml

@@ -0,0 +1,16 @@
+name: Docker Image CI
+
+on:
+  push:
+    branches: ["**"]
+  pull_request:
+    branches: ["**"]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v6
+      - name: Build the Docker image
+        run: docker build . --file Dockerfile --tag my-image-name:$(date +%s)

README.md

@@ -1,6 +1,7 @@
 # LBRY Daemon
 
 [![Go](https://github.com/LBRYFoundation/lbry-daemon/actions/workflows/go.yml/badge.svg)](https://github.com/LBRYFoundation/lbry-daemon/actions/workflows/go.yml)
+[![Docker Image CI](https://github.com/LBRYFoundation/lbry-daemon/actions/workflows/docker-image.yml/badge.svg)](https://github.com/LBRYFoundation/lbry-daemon/actions/workflows/docker-image.yml)
 [![Codecov](https://codecov.io/gh/LBRYFoundation/lbry-daemon/graph/badge.svg)](https://codecov.io/gh/LBRYFoundation/lbry-daemon)
 ![Snapcraft Version](https://img.shields.io/snapcraft/v/lbry-daemon/latest/stable?logo=snapcraft)
 ![WinGet Package Version](https://img.shields.io/winget/v/LBRY.Daemon)