docs: add run instructions in README

.gitea/workflows/docker-build.yml

@@ -7,14 +7,14 @@ on:
 
 jobs:
   docker-build:
-    runs-on: docker
+    runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
         uses: actions/checkout@v3
 
       - name: Set up variables
         run: |
-          IMAGE="${{ secrets.GITEA_REGISTRY }}/${{ secrets.GITEA_USERNAME }}/flingue-website"
+          IMAGE="${{ secrets.REGISTRY_URL }}/${{ secrets.REGISTRY_USERNAME }}/flingue-website"
           SHA_TAG=$(echo "${GITHUB_SHA}" | cut -c1-7)
           echo "IMAGE=$IMAGE" >> $GITHUB_ENV
           echo "SHA_TAG=$SHA_TAG" >> $GITHUB_ENV

README.md

@@ -0,0 +1,26 @@
+![Docker build pipeline badge](https://git.lucaasmth.me/lucas.mathieu/flingue-website/actions/workflows/docker-build.yml/badge.svg)
+
+# Flingue Website
+
+## Description
+
+Small static website served by an Nginx container.
+
+## How to run
+
+### With docker run
+
+```bash
+docker run -p 8080:80 git.lucaasmth.me/lucas.mathieu/flingue-website:latest
+```
+
+### With docker compose
+
+```yaml
+services:
+  flingue-website:
+    image: git.lucaasmth.me/lucas.mathieu/flingue-website:latest
+    ports:
+      - 8080:80
+```
+