Initial Cloudron package for Jellyseerr

- Add CloudronManifest.json with app configuration
- Add Dockerfile with Node.js 22 support and multi-stage build
- Add start.sh script for runtime initialization
- Add icon.png for the app
- Update README.md with installation and usage instructions
- Configure config directory symlink to /app/data for persistent storage

Dockerfile

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+# build stage
+FROM cloudron/base:5.0.0@sha256:6bec2b5246567ef8b5b13ca0af756e2e596941e440d76b46635211cd84383922 AS build_image
+
+WORKDIR /app
+
+# Install Node.js 22 (required by Jellyseerr)
+# Remove old Node.js installation and install Node.js 22 binary directly
+RUN apt-get update && \
+    apt-get install -y curl xz-utils && \
+    rm -rf /usr/local/node-* && \
+    NODE_VERSION="22.11.0" && \
+    ARCH="x64" && \
+    curl -fsSL "https://nodejs.org/dist/v${NODE_VERSION}/node-v${NODE_VERSION}-linux-${ARCH}.tar.xz" -o /tmp/node.tar.xz && \
+    tar -xJf /tmp/node.tar.xz -C /usr/local --strip-components=1 && \
+    rm /tmp/node.tar.xz && \
+    ln -sf /usr/local/bin/node /usr/bin/node && \
+    ln -sf /usr/local/bin/npm /usr/bin/npm && \
+    node --version && \
+    npm --version && \
+    which node
+
+# Install pnpm
+RUN npm install --global pnpm
+
+RUN git clone https://github.com/Fallenbagel/jellyseerr.git && cd jellyseerr
+
+WORKDIR /app/jellyseerr
+
+# Verify Node.js version before installing
+RUN node --version && \
+    which node && \
+    CYPRESS_INSTALL_BINARY=0 pnpm install --frozen-lockfile
+
+RUN pnpm build
+
+# remove development dependencies
+RUN pnpm prune --prod --ignore-scripts
+
+RUN rm -rf src server .next/cache
+
+# runtime stage
+FROM cloudron/base:5.0.0@sha256:6bec2b5246567ef8b5b13ca0af756e2e596941e440d76b46635211cd84383922
+
+WORKDIR /app/code/jellyseerr
+
+# Install Node.js 22 for runtime as well
+# Remove old Node.js installation and install Node.js 22 binary directly
+RUN apt-get update && \
+    apt-get install -y curl xz-utils && \
+    rm -rf /usr/local/node-* && \
+    NODE_VERSION="22.11.0" && \
+    ARCH="x64" && \
+    curl -fsSL "https://nodejs.org/dist/v${NODE_VERSION}/node-v${NODE_VERSION}-linux-${ARCH}.tar.xz" -o /tmp/node.tar.xz && \
+    tar -xJf /tmp/node.tar.xz -C /usr/local --strip-components=1 && \
+    rm /tmp/node.tar.xz && \
+    ln -sf /usr/local/bin/node /usr/bin/node && \
+    ln -sf /usr/local/bin/npm /usr/bin/npm && \
+    node --version && \
+    npm --version && \
+    which node
+
+# Install pnpm
+RUN npm install -g pnpm
+
+RUN mkdir -p /app/code/jellyseerr
+
+COPY --from=build_image /app/jellyseerr /app/code/jellyseerr
+
+# Remove the read-only config directory from source and create symlink to persistent storage
+# The symlink points to /app/data/config which will be mounted by Cloudron at runtime
+RUN rm -rf /app/code/jellyseerr/config && \
+    ln -s /app/data/config /app/code/jellyseerr/config
+
+COPY start.sh /app/code/start.sh
+RUN chmod +x /app/code/start.sh
+
+CMD [ "/app/code/start.sh" ]
+