build: add Docker deployment

Created a Dockerfile and nginx configuration and added environment
variables into the codebase to support Docker compose.

ref: N25B-282

.dockerignore

@@ -0,0 +1,11 @@
+node_modules
+dist
+Dockerfile
+.dockerignore
+.git/
+.githooks/
+__mocks__/
+test/
+eslint.config.js
+jest.config.js
+README.md

Dockerfile

@@ -0,0 +1,46 @@
+# --- Building static files ---
+FROM node:23-alpine AS build
+
+WORKDIR /app
+
+COPY package.json package-lock.json ./
+
+RUN npm ci
+
+COPY . .
+
+RUN npm run build
+
+
+# --- Serving ---
+FROM nginx:alpine
+
+RUN mkdir -p /app/www
+
+COPY --from=build /app/dist /app/www
+
+COPY nginx.conf /etc/nginx/templates/default.conf.template
+
+RUN adduser -D -H -u 1001 -s /sbin/nologin webuser
+
+RUN chown -R webuser:webuser /app/www && \
+  chmod -R 755 /app/www && \
+  chown -R webuser:webuser /var/cache/nginx && \
+  chown -R webuser:webuser /var/log/nginx && \
+  chown -R webuser:webuser /etc/nginx/conf.d && \
+  touch /var/run/nginx.pid && \
+  chown -R webuser:webuser /var/run/nginx.pid && \
+  chmod -R 777 /etc/nginx/conf.d
+
+ENV PORT=80
+ENV NGINX_ENVSUBST_TEMPLATE_DIR=/etc/nginx/templates
+ENV NGINX_ENVSUBST_TEMPLATE_SUFFIX=.template
+ENV NGINX_ENVSUBST_OUTPUT_DIR=/etc/nginx/conf.d
+# Default value, potentially overwritten in compose file
+ENV BACKEND_ADDRESS="http://localhost:8000"
+
+EXPOSE ${PORT}
+
+USER webuser
+
+CMD [ "nginx", "-g", "daemon off;" ]

nginx.conf

@@ -0,0 +1,26 @@
+server {
+    listen ${PORT};
+    server_name localhost;
+    root /app/www;
+
+    # Security headers
+    add_header X-Frame-Options "SAMEORIGIN";
+    add_header X-XSS-Protection "1; mode=block";
+    add_header X-Content-Type-Options "nosniff";
+
+    # Compression
+    gzip on;
+    gzip_types text/plain text/css application/json application/javascript text/xml application/xml application/xml+rss text/javascript;
+
+    location / {
+        try_files $uri $uri/ /index.html;
+        expires -1;
+    }
+
+    # Cache static assets
+    location /assets {
+        expires 1y;
+        add_header Cache-Control "public, no-transform";
+    }
+}
+

src/pages/Robot/Robot.tsx

@@ -4,13 +4,13 @@ export default function Robot() {
   const [message, setMessage] = useState('');
 
   const [listening, setListening] = useState(false);
-  const [conversation, setConversation] = useState<{"role": "user" | "assistant", "content": string}[]>([])
+  const [conversation, setConversation] = useState<{ "role": "user" | "assistant", "content": string }[]>([])
   const conversationRef = useRef<HTMLDivElement | null>(null);
   const [conversationIndex, setConversationIndex] = useState(0);
 
   const sendMessage = async () => {
     try {
-      const response = await fetch("http://localhost:8000/message", {
+      const response = await fetch(`${process.env.BACKEND_ADDRESS}/message`, {
         method: "POST",
         headers: {
           "Content-Type": "application/json",
@@ -25,14 +25,14 @@ export default function Robot() {
   };
 
   useEffect(() => {
-    const eventSource = new EventSource("http://localhost:8000/sse");
+    const eventSource = new EventSource(`${process.env.BACKEND_ADDRESS}/sse`);
 
     eventSource.onmessage = (event) => {
       try {
         const data = JSON.parse(event.data);
         if ("voice_active" in data) setListening(data.voice_active);
-        if ("speech" in data) setConversation(conversation => [...conversation, {"role": "user", "content": data.speech}]);
+        if ("speech" in data) setConversation(conversation => [...conversation, { "role": "user", "content": data.speech }]);
-        if ("llm_response" in data) setConversation(conversation => [...conversation, {"role": "assistant", "content": data.llm_response}]);
+        if ("llm_response" in data) setConversation(conversation => [...conversation, { "role": "assistant", "content": data.llm_response }]);
       } catch {
         console.log("Unparsable SSE message:", event.data);
       }
@@ -65,7 +65,7 @@ export default function Robot() {
       <div className={"flex-col gap-lg align-center"}>
         <h2>Conversation</h2>
         <p>Listening {listening ? "🟢" : "🔴"}</p>
-        <div style={{ maxHeight: "200px", maxWidth: "600px", overflowY: "auto"}} ref={conversationRef}>
+        <div style={{ maxHeight: "200px", maxWidth: "600px", overflowY: "auto" }} ref={conversationRef}>
           {conversation.map((item, i) => (
             <p key={i}
               style={{

tsconfig.app.json

@@ -3,11 +3,17 @@
     "tsBuildInfoFile": "./node_modules/.tmp/tsconfig.app.tsbuildinfo",
     "target": "ES2022",
     "useDefineForClassFields": true,
-    "lib": ["ES2022", "DOM", "DOM.Iterable"],
+    "lib": [
+      "ES2022",
+      "DOM",
+      "DOM.Iterable"
+    ],
     "module": "ESNext",
-    "types": ["vite/client"],
+    "types": [
+      "vite/client",
+      "node"
+    ],
     "skipLibCheck": true,
-
     /* Bundler mode */
     "moduleResolution": "bundler",
     "allowImportingTsExtensions": true,
@@ -15,7 +21,6 @@
     "moduleDetection": "force",
     "noEmit": true,
     "jsx": "react-jsx",
-
     /* Linting */
     "strict": true,
     "noUnusedLocals": true,
@@ -24,5 +29,8 @@
     "noFallthroughCasesInSwitch": true,
     "noUncheckedSideEffectImports": true
   },
-  "include": ["src","test"]
+  "include": [
+    "src",
+    "test"
+  ]
 }