diff --git a/.dockerignore b/.dockerignore
new file mode 100644
index 000000000..0d47540c8
--- /dev/null
+++ b/.dockerignore
@@ -0,0 +1,7 @@
+node_modules
+dist
+.git
+.github
+.devcontainer
+docs
+CLAUDE.md
diff --git a/.github/workflows/docker.yml b/.github/workflows/docker.yml
new file mode 100644
index 000000000..7689a4a9a
--- /dev/null
+++ b/.github/workflows/docker.yml
@@ -0,0 +1,56 @@
+name: Docker image
+
+on:
+  push:
+    branches: [main]
+    tags: ['v*']
+  pull_request:
+    paths:
+      - Dockerfile
+      - docker/**
+      - .github/workflows/docker.yml
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: docker/setup-qemu-action@v3
+
+      - uses: docker/setup-buildx-action@v3
+
+      - name: Log in to GHCR
+        if: github.event_name != 'pull_request'
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Image metadata
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ghcr.io/${{ github.repository }}
+          tags: |
+            type=raw,value=latest,enable={{is_default_branch}}
+            type=semver,pattern={{version}}
+            type=semver,pattern={{major}}
+            type=sha
+
+      - name: Build and push
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          # arm64 so the image runs on a Raspberry Pi in the pit
+          platforms: linux/amd64,linux/arm64
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 000000000..4899295b0
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,15 @@
+FROM node:22-alpine AS build
+WORKDIR /app
+COPY package.json package-lock.json ./
+RUN npm ci
+COPY . .
+# GitHub Pages serves from /QRScout/; containers serve from the domain root.
+ARG BASE_PATH=/
+RUN npm run build -- --base=$BASE_PATH
+
+FROM nginx:1.27-alpine
+COPY docker/nginx.conf /etc/nginx/conf.d/default.conf
+COPY --from=build /app/dist /usr/share/nginx/html
+EXPOSE 80
+HEALTHCHECK --interval=30s --timeout=3s \
+  CMD wget -qO /dev/null http://127.0.0.1/healthz || exit 1
diff --git a/docker/nginx.conf b/docker/nginx.conf
new file mode 100644
index 000000000..ea6d0181e
--- /dev/null
+++ b/docker/nginx.conf
@@ -0,0 +1,26 @@
+server {
+    listen 80;
+    server_name _;
+    root /usr/share/nginx/html;
+    index index.html;
+
+    gzip on;
+    gzip_types text/css application/javascript application/json image/svg+xml;
+
+    location = /healthz {
+        access_log off;
+        return 200 "ok";
+    }
+
+    # Hashed build assets are safe to cache forever.
+    location /assets/ {
+        add_header Cache-Control "public, max-age=31536000, immutable";
+    }
+
+    # Teams mount their scouting config at
+    # /usr/share/nginx/html/team-config.json and load it in the app
+    # via https://<host>/team-config.json.
+    location / {
+        try_files $uri $uri/ /index.html;
+    }
+}
diff --git a/index.html b/index.html
index 60067c950..e31c7a627 100644
--- a/index.html
+++ b/index.html
@@ -11,20 +11,20 @@
     <meta name="keywords" content="Keywords" />
     <title>QR Scout</title>
 
-    <link rel="manifest" href="/QRScout/manifest.json" />
+    <link rel="manifest" href="%BASE_URL%manifest.json" />
     <link
-      href="/QRScout/icons/favicon-16x16.png"
+      href="%BASE_URL%icons/favicon-16x16.png"
       rel="icon"
       type="image/png"
       sizes="16x16"
     />
     <link
-      href="/QRScout/icons/favicon-32x32.png"
+      href="%BASE_URL%icons/favicon-32x32.png"
       rel="icon"
       type="image/png"
       sizes="32x32"
     />
-    <link rel="apple-touch-icon" href="/QRScout/apple-icon.png" />
+    <link rel="apple-touch-icon" href="%BASE_URL%apple-icon.png" />
     <meta name="theme-color" content="#317EFB" />
   </head>
   <body>
diff --git a/public/manifest.json b/public/manifest.json
index a33744d06..ef206c5f9 100644
--- a/public/manifest.json
+++ b/public/manifest.json
@@ -5,8 +5,8 @@
   "background_color": "#f03d41",
   "display": "standalone",
   "orientation": "portrait",
-  "scope": "/QRScout/",
-  "start_url": "/QRScout/",
+  "scope": "./",
+  "start_url": "./",
   "icons": [
     {"src": "icons/icon-36x36.png", "sizes": "36x36", "type": "image/png"},
     {"src": "icons/icon-48x48.png", "sizes": "48x48", "type": "image/png"},