diff --git a/.dockerignore b/.dockerignore
new file mode 100644
index 0000000..0715d0b
--- /dev/null
+++ b/.dockerignore
@@ -0,0 +1,10 @@
+**/node_modules
+**/dist
+**/build
+**/.dart_tool
+**/coverage
+.git
+**/*.log
+# Secrets: passed at runtime via env_file / bind mount, never baked in.
+backend/.env
+backend/serviceAccount.json
diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..a8261e9
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,34 @@
+# syntax=docker/dockerfile:1
+
+# --- 1. Flutter web build -------------------------------------------------
+FROM ghcr.io/cirruslabs/flutter:stable AS web
+WORKDIR /src
+COPY client/app/pubspec.yaml client/app/pubspec.lock ./
+RUN flutter pub get
+COPY client/app/ ./
+RUN flutter build web --release
+
+# --- 2. Backend build --------------------------------------------------------
+FROM node:20-bookworm-slim AS api-build
+WORKDIR /src
+COPY backend/package.json backend/package-lock.json ./
+RUN npm ci
+COPY backend/ ./
+RUN npx prisma generate && npm run build
+
+# --- 3. Runtime ------------------------------------------------------------
+FROM node:20-bookworm-slim AS runtime
+ENV NODE_ENV=production
+WORKDIR /app
+# Prisma needs OpenSSL at runtime.
+RUN apt-get update && apt-get install -y --no-install-recommends openssl \
+  && rm -rf /var/lib/apt/lists/*
+COPY --from=api-build /src/node_modules ./node_modules
+COPY --from=api-build /src/dist ./dist
+COPY --from=api-build /src/prisma ./prisma
+# The Flutter web build; app.module reads WEB_CLIENT_DIR.
+COPY --from=web /src/build/web ./web
+ENV WEB_CLIENT_DIR=/app/web
+EXPOSE 3000
+# Apply pending migrations, then boot.
+CMD ["sh", "-c", "npx prisma migrate deploy && node dist/main.js"]
diff --git a/README.md b/README.md
index 5e0b069..2229e9a 100644
--- a/README.md
+++ b/README.md
@@ -5,6 +5,21 @@ events (KCs), replacing the WordPress plugin "Workshop-Wahlen". See
 [plan-kcAppMultiTenantPlatform.prompt.md](plan-kcAppMultiTenantPlatform.prompt.md)
 for the full architecture and phased roadmap.
 
+## Run with Docker
+
+```bash
+cp backend/.env.example backend/.env      # fill in the secrets
+# put the Firebase service account at backend/serviceAccount.json (optional; push)
+docker compose up --build
+```
+
+`docker-compose.yml` starts PostgreSQL 16 and one `api` container (multi-stage
+`Dockerfile`: Flutter web build → NestJS build → slim runtime). The container
+runs `prisma migrate deploy` on start and serves the whole app — Flutter web
+client + REST API — on <http://localhost:3000>. Requires Docker Compose v2.
+Secrets are read from `backend/.env` and the service-account JSON is bind-
+mounted read-only; neither is baked into the image.
+
 ## Structure
 
 - `backend/` — NestJS API (Prisma/PostgreSQL, Authentik OIDC as resource
diff --git a/docker-compose.yml b/docker-compose.yml
new file mode 100644
index 0000000..31c6633
--- /dev/null
+++ b/docker-compose.yml
@@ -0,0 +1,40 @@
+services:
+  db:
+    image: postgres:16-alpine
+    environment:
+      POSTGRES_USER: postgres
+      POSTGRES_PASSWORD: postgres
+      POSTGRES_DB: kcapp
+    volumes:
+      - pgdata:/var/lib/postgresql/data
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U postgres -d kcapp"]
+      interval: 5s
+      timeout: 5s
+      retries: 10
+
+  api:
+    build:
+      context: .
+      dockerfile: Dockerfile
+    depends_on:
+      db:
+        condition: service_healthy
+    # All non-DB config comes from backend/.env (needs Docker Compose v2,
+    # which strips surrounding quotes). DATABASE_URL and the FCM credential
+    # path are overridden below for the container.
+    env_file:
+      - backend/.env
+    environment:
+      DATABASE_URL: postgresql://postgres:postgres@db:5432/kcapp?schema=public
+      PORT: "3000"
+      GOOGLE_APPLICATION_CREDENTIALS: /app/serviceAccount.json
+      APP_BASE_URL: http://localhost:3000
+    ports:
+      - "3000:3000"
+    volumes:
+      # Firebase service account — kept out of the image, mounted read-only.
+      - ./backend/serviceAccount.json:/app/serviceAccount.json:ro
+
+volumes:
+  pgdata: