Add Docker Compose deployment config

Multi-stage Dockerfile: node:22-alpine builder + nginx:alpine server.
nginx.conf sets COOP/COEP headers (required for SharedArrayBuffer/audio workers),
SPA fallback, and aggressive caching for content-hashed assets.
API credentials and BASE_URL passed as build args.

Dockerfile

@@ -0,0 +1,28 @@
+FROM node:22-alpine AS builder
+
+WORKDIR /app
+
+COPY package*.json ./
+RUN npm ci
+
+COPY . .
+
+ARG TELEGRAM_API_ID
+ARG TELEGRAM_API_HASH
+ARG BASE_URL=/
+
+ENV TELEGRAM_API_ID=$TELEGRAM_API_ID
+ENV TELEGRAM_API_HASH=$TELEGRAM_API_HASH
+ENV BASE_URL=$BASE_URL
+ENV NODE_ENV=production
+
+RUN npm run build:production
+
+# ---
+
+FROM nginx:alpine
+
+COPY --from=builder /app/dist /usr/share/nginx/html
+COPY nginx.conf /etc/nginx/conf.d/default.conf
+
+EXPOSE 80

docker-compose.yml

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+services:
+  telegram-tt:
+    build:
+      context: .
+      args:
+        TELEGRAM_API_ID: ${TELEGRAM_API_ID}
+        TELEGRAM_API_HASH: ${TELEGRAM_API_HASH}
+        BASE_URL: ${BASE_URL:-/}
+    restart: unless-stopped
+    ports:
+      - "${PORT:-8080}:80"

nginx.conf

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+server {
+    listen 80;
+    server_name _;
+
+    root /usr/share/nginx/html;
+    index index.html;
+
+    # WASM needs correct MIME type
+    types {
+        application/wasm wasm;
+    }
+
+    # SharedArrayBuffer requires these headers (used by audio/video workers)
+    add_header Cross-Origin-Opener-Policy "same-origin";
+    add_header Cross-Origin-Embedder-Policy "require-corp";
+
+    # SPA fallback
+    location / {
+        try_files $uri $uri/ /index.html;
+    }
+
+    # Cache static assets aggressively (content-hashed filenames)
+    location ~* \.(js|css|wasm|woff2|woff|ttf|png|jpg|webp|svg|ico)$ {
+        expires 1y;
+        add_header Cache-Control "public, immutable";
+        add_header Cross-Origin-Opener-Policy "same-origin";
+        add_header Cross-Origin-Embedder-Policy "require-corp";
+    }
+
+    gzip on;
+    gzip_types text/plain text/css application/javascript application/json application/wasm;
+    gzip_min_length 1024;
+}