Initial commit: standalone quiz-testing system

Full-stack F# (Domain/Server/Client via Fable+Elmish+Feliz), PostgreSQL
persistence via Dapper, Docker Compose deployment. Student quiz-taking flow
with time-limit enforcement and focus-loss tracking, Teacher question bank
and quiz builder with results analytics, Admin user management.

docker-compose.yml

@@ -0,0 +1,47 @@
+services:
+  postgres:
+    image: postgres:16-alpine
+    environment:
+      POSTGRES_DB: quizsystem
+      POSTGRES_USER: quizsystem
+      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:-devpassword}
+    volumes:
+      - pgdata:/var/lib/postgresql/data
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U quizsystem -d quizsystem"]
+      interval: 5s
+      timeout: 5s
+      retries: 10
+    networks: [quizsystem]
+
+  server:
+    build:
+      context: .
+      dockerfile: src/Server/Dockerfile
+    environment:
+      ConnectionStrings__Postgres: "Host=postgres;Port=5432;Database=quizsystem;Username=quizsystem;Password=${POSTGRES_PASSWORD:-devpassword}"
+      Jwt__Secret: ${JWT_SECRET:?Set JWT_SECRET in .env — see .env.example}
+      Client__Origin: "http://localhost:8081"
+      ASPNETCORE_ENVIRONMENT: Production
+    depends_on:
+      postgres:
+        condition: service_healthy
+    # Mapped to the same host port the client's hardcoded
+    # Client/Shared/JsonWire.fs `serverUrl` already expects — the browser
+    # (not any container) is what resolves "localhost:5144", so this keeps
+    # that working unmodified for local/dev use of the compose stack.
+    ports: ["5144:8080"]
+    networks: [quizsystem]
+
+  client:
+    build:
+      context: .
+      dockerfile: src/Client/Dockerfile
+    ports: ["8081:80"]
+    networks: [quizsystem]
+
+volumes:
+  pgdata:
+
+networks:
+  quizsystem: