add dockerfile and gitea workflow

.gitea/workflows/build.yaml

@@ -0,0 +1,28 @@
+name: 404 page build
+
+on:
+  push:
+    branches:
+      - develop
+
+jobs:
+  page-build:
+    runs-on: ubuntu-22.04
+    concurrency:
+      group: ${{ github.workflow }}-${{ github.ref }}
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Login to registry
+        uses: docker/login-action@v1
+        with:
+          registry: gitea.amundsson.eu
+          username: namundsson@gmail.com
+          password: ${{ secrets.REGISTRY_PASSWORD }}
+
+      - name: Build and push Docker image
+        run: |
+          docker build -t gitea.amundsson.eu/n1jos/404-page:latest .
+          docker push gitea.amundsson.eu/n1jos/404-page:latest

Dockerfile

@@ -0,0 +1,3 @@
+FROM nginx:latest
+COPY src /usr/share/nginx/html
+EXPOSE 80