Add CORS support and Docker configuration for web service

- Added CORS allowed origins in config.compose.yaml to enable cross-origin requests from the web service.
- Updated docker-compose.yml to include a new web service with build context and port mapping for local development.
- Enhanced gateway.go to support additional HTTP methods in CORS responses.
- Updated README.md to document the new web service and its configuration requirements.

web/Dockerfile

@@ -0,0 +1,16 @@
+# Статическая сборка SvelteKit и раздача через serve
+FROM node:22-alpine AS build
+WORKDIR /app
+ARG PUBLIC_TELEMT_GATEWAY_URL=http://127.0.0.1:8080
+ENV PUBLIC_TELEMT_GATEWAY_URL=$PUBLIC_TELEMT_GATEWAY_URL
+COPY package.json package-lock.json ./
+RUN npm ci
+COPY . .
+RUN npm run build
+
+FROM node:22-alpine
+RUN npm install -g serve@14
+WORKDIR /srv
+COPY --from=build /app/build ./build
+EXPOSE 4173
+CMD ["serve", "-s", "build", "-l", "4173"]