Add Docker build and run workflow

.dockerignore

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+.git/
+node_modules/
+dist/
+
+.vite.log
+*.log
+
+.DS_Store
+Dockerfile
+README.md

Dockerfile

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+# syntax=docker/dockerfile:1
+
+FROM node:22-alpine AS build
+
+WORKDIR /app
+
+COPY package*.json ./
+RUN npm ci
+
+COPY index.html vite.config.js ./
+COPY src ./src
+
+RUN npm run build
+
+FROM nginx:1.27-alpine
+
+ENV NOTES_API_UPSTREAM=http://host.docker.internal:8080
+
+COPY nginx.conf.template /etc/nginx/templates/default.conf.template
+COPY --from=build /app/dist /usr/share/nginx/html
+
+EXPOSE 80
+
+HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
+  CMD wget -qO- http://127.0.0.1/ >/dev/null || exit 1

Makefile

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+IMAGE_NAME ?= notes-vault-client
+IMAGE_TAG ?= latest
+CONTAINER_NAME ?= notes-vault-client
+HOST_PORT ?= 8081
+NOTES_API_UPSTREAM ?= http://host.docker.internal:8080
+
+IMAGE := $(IMAGE_NAME):$(IMAGE_TAG)
+
+.PHONY: help install build docker-build docker-run docker-stop docker-restart docker-logs docker-clean
+
+help:
+	@echo "Targets:"
+	@echo "  make install          Install Node dependencies"
+	@echo "  make build            Build the Vite app into dist/"
+	@echo "  make docker-build     Build the Docker image"
+	@echo "  make docker-run       Run the Docker container"
+	@echo "  make docker-stop      Stop the running Docker container"
+	@echo "  make docker-restart   Rebuild and restart the Docker container"
+	@echo "  make docker-logs      Follow container logs"
+	@echo "  make docker-clean     Remove the Docker image"
+	@echo ""
+	@echo "Variables:"
+	@echo "  IMAGE_NAME=$(IMAGE_NAME)"
+	@echo "  IMAGE_TAG=$(IMAGE_TAG)"
+	@echo "  CONTAINER_NAME=$(CONTAINER_NAME)"
+	@echo "  HOST_PORT=$(HOST_PORT)"
+	@echo "  NOTES_API_UPSTREAM=$(NOTES_API_UPSTREAM)"
+
+install:
+	npm ci
+
+build:
+	npm run build
+
+docker-build:
+	docker build -t $(IMAGE) .
+
+docker-run:
+	docker rm -f $(CONTAINER_NAME) >/dev/null 2>&1 || true
+	docker run --rm -d \
+		--name $(CONTAINER_NAME) \
+		-p $(HOST_PORT):80 \
+		-e NOTES_API_UPSTREAM=$(NOTES_API_UPSTREAM) \
+		$(IMAGE)
+	@echo "Running $(IMAGE) at http://localhost:$(HOST_PORT)"
+
+docker-stop:
+	docker stop $(CONTAINER_NAME)
+
+docker-restart: docker-build docker-run
+
+docker-logs:
+	docker logs -f $(CONTAINER_NAME)
+
+docker-clean:
+	docker image rm $(IMAGE)

nginx.conf.template

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+server {
+  listen 80;
+  server_name _;
+
+  root /usr/share/nginx/html;
+  index index.html;
+
+  location /api/ {
+    proxy_http_version 1.1;
+    proxy_set_header Host $host;
+    proxy_set_header X-Real-IP $remote_addr;
+    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+    proxy_set_header X-Forwarded-Proto $scheme;
+    proxy_pass ${NOTES_API_UPSTREAM}/;
+  }
+
+  location /assets/ {
+    try_files $uri =404;
+    expires 1y;
+    add_header Cache-Control "public, immutable";
+  }
+
+  location / {
+    try_files $uri $uri/ /index.html;
+  }
+}