Initial STUN NAT mapping console

Dockerfile

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+FROM alpine:3.21 AS natmap-build
+RUN apk add --no-cache build-base git linux-headers
+WORKDIR /build
+COPY patches/natmap-health.patch /tmp/natmap-health.patch
+ARG NATMAP_REF=1853fc21aff07a1d5fdfb31c7e90af34fddf0296
+RUN git clone --recursive https://github.com/heiher/natmap.git . \
+    && git checkout "$NATMAP_REF" \
+    && git submodule update --init --recursive \
+    && patch -p1 < /tmp/natmap-health.patch \
+    && make CFLAGS='-Wno-error'
+
+FROM node:24-alpine
+RUN apk add --no-cache iptables libstdc++
+WORKDIR /app
+COPY --from=natmap-build /build/bin/natmap /usr/local/bin/natmap
+COPY package.json server.js probe-server.js ./
+COPY scripts ./scripts
+COPY public ./public
+RUN chmod 0755 /app/scripts/notify.js \
+    && mkdir -p /data \
+    && chown -R node:node /app /data
+USER node
+ENV STUNMAP_DATA_DIR=/data \
+    NATMAP_BIN=/usr/local/bin/natmap \
+    NODE_ENV=production \
+    PORT=16888
+EXPOSE 16888
+EXPOSE 16900
+CMD ["node", "server.js"]