add dockerfile and build script

.forgejo/workflows/build.yaml

@@ -0,0 +1,29 @@
+name: Docker Build
+on:
+  push:
+    branches:
+      - master
+  workflow_dispatch:
+
+jobs:
+  Build and Push Images:
+    runs-on: docker
+    container: catthehacker/ubuntu:act-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v3
+        with:
+          token: ${{ secrets.COASTALCOMMITSTOKEN }}
+      - name: Login to CoastalCommits
+        uses: actions/docker-login@v3
+        with:
+          registry: www.coastalcommits.com
+          username: Seaswimmer
+          password: ${{ secrets.COASTALCOMMITSTOKEN }}
+      - name: Build and push GalacticFactory image
+        uses: actions/docker-build-push@v5
+        with:
+          context: .
+          file: ./mediawiki/Dockerfile
+          push: true
+          tags: www.coastalcommits.com/zenith/mediawiki:latest