feat: open community panel (read-only clients only)

Ship full install stack with .amnezia-panel-edition=community; docs and
footer point to Boosty/PRO. Managing peers, export, cascade and WARP
require private PRO build.

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

Dockerfile

@@ -0,0 +1,20 @@
+FROM node:22-alpine
+
+RUN apk add --no-cache docker-cli openssh-client sshpass
+
+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"]