docs: publish install/uninstall scripts, README, FUNDING, support footer

Add curl-one-liner install with generated password file; uninstall flags for image/data/src; optional ALLOW_DEFAULT_PASSWORD; footer mirroring GitHub/Boosty/Telegram layout.

Co-authored-by: Cursor <cursoragent@cursor.com>

Dockerfile

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+FROM node:22-alpine
+
+RUN apk add --no-cache docker-cli
+
+RUN mkdir -p /data && chmod 700 /data
+
+WORKDIR /app
+
+COPY package.json ./
+RUN npm install --omit=dev
+
+COPY server.js ./server.js
+COPY public ./public
+
+ENV NODE_ENV=production
+ENV PORT=3980
+
+EXPOSE 3980
+
+CMD ["node", "server.js"]