> ## Documentation Index > Fetch the complete documentation index at: https://docs.appsignal.com/llms.txt > Use this file to discover all available pages before exploring further. # Webmachine export const VersionRequirements = ({versions = []}) => { if (!Array.isArray(versions) || versions.length === 0) { return null; } const boundaries = { upper: " or lower", exact: "", lower: " or higher" }; const containerStyle = { marginTop: "0.5rem", marginBottom: "1.5rem" }; const lineStyle = { display: "block", margin: "0 0 0.35rem 0", fontSize: "0.875rem", lineHeight: "1.4" }; const pillBaseStyle = { display: "inline-block", padding: "0.1em 0.4em", borderRadius: "0.25rem", border: "1px solid", fontFamily: "ui-monospace, SFMono-Regular, Menlo, monospace", fontSize: "0.85em", fontWeight: 500 }; const pillColors = { "AppSignal for Elixir": { background: "#f3e8ff", borderColor: "#e9d5ff", color: "#9333ea" }, "AppSignal for Front-end": { background: "#fef9c3", borderColor: "#fde68a", color: "#ca8a04" }, "AppSignal for Go": { background: "#ccfbf1", borderColor: "#99f6e4", color: "#0d9488" }, "AppSignal for JavaScript": { background: "#fef9c3", borderColor: "#fde68a", color: "#ca8a04" }, "AppSignal for Node.js": { background: "#dcfce7", borderColor: "#bbf7d0", color: "#16a34a" }, "AppSignal for Python": { background: "#dbeafe", borderColor: "#bfdbfe", color: "#2563eb" }, "AppSignal for Ruby": { background: "#fee2e2", borderColor: "#fecaca", color: "#dc2626" }, "AppSignal for Rust": { background: "#ffedd5", borderColor: "#fed7aa", color: "#ea580c" } }; const defaultPillColor = { background: "#f4f4f5", borderColor: "#e4e4e7", color: "#52525b" }; const getPillStyle = name => ({ ...pillBaseStyle, ...pillColors[name] || defaultPillColor }); const getBoundText = bound => { return boundaries[bound] || boundaries.lower; }; return

{versions.map((v, i) =>

This feature requires{" "} {v.name} version {v.version} {getBoundText(v.bound)}.

)}

; }; ## Installation A [Webmachine](https://github.com/webmachine/webmachine-ruby/) application requires a few manual steps to get working. 1. Create the AppSignal configuration file or configure it with environment variables. For more details on configuring AppSignal, see the [Ruby configuration](/ruby/configuration) page. 2. Make sure AppSignal is required, `require "appsignal"`. 3. Configure AppSignal using `Appsignal.config`. 4. Start AppSignal using `Appsignal.start`. An example of a Webmachine `app.rb` file: ```ruby Ruby theme={null} # app.rb require "webmachine" require "appsignal" Appsignal.start class MyResource < Webmachine::Resource def to_html "Hello, world!" end end # Start a web server to serve requests via localhost MyResource.run ``` After these steps, start your Webmachine app and wait for data to arrive in AppSignal.