Initial commit: Shelem card game

Full-stack multiplayer Shelem (Iranian trick-taking card game) with
Socket.IO, JWT auth, bot players, joker mode, and mobile-friendly UI.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Dockerfile

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+FROM node:20-alpine
+
+WORKDIR /app
+
+COPY package.json ./
+RUN npm install --omit=dev
+
+RUN apk add --no-cache openssl && \
+    mkdir -p /app/ssl && \
+    openssl req -x509 -newkey rsa:2048 \
+      -keyout /app/ssl/key.pem -out /app/ssl/cert.pem \
+      -days 3650 -nodes -subj "/CN=shelem-game" && \
+    apk del openssl
+
+COPY server.js ./
+COPY gen-icons.js ./
+COPY public/ ./public/
+# cards/ supplied at runtime via docker-compose volume mount
+RUN rm -rf /app/public/cards && mkdir -p /app/public/cards
+
+RUN node gen-icons.js
+
+EXPOSE 4000 4443
+
+CMD ["node", "server.js"]