Refactor certbot plugins install

- Added a script to install every single plugin, used in development and debugging
- Improved certbot plugin install commands
- Adjusted some version for plugins to install properly
- It's noted that some plugins require deps that do not match other plugins,
  however these use cases should be extremely rare

backend/lib/certbot.js

@@ -0,0 +1,46 @@
+const dnsPlugins = require('../global/certbot-dns-plugins.json');
+const utils      = require('./utils');
+const error      = require('./error');
+const logger     = require('../logger').certbot;
+
+// const letsencryptStaging = config.useLetsencryptStaging();
+// const letsencryptConfig  = '/etc/letsencrypt.ini';
+// const certbotCommand     = 'certbot';
+
+// const acmeVersion  = '1.32.0';
+const CERTBOT_VERSION_REPLACEMENT = '$(certbot --version | grep -Eo \'[0-9](\\.[0-9]+)+\')';
+
+const certbot = {
+
+	/**
+	 * Installs a cerbot plugin given the key for the object from
+	 * ../global/certbot-dns-plugins.json
+	 *
+	 * @param   {string}  pluginKey
+	 * @returns {Object}
+	 */
+	installPlugin: async function (pluginKey) {
+		if (typeof dnsPlugins[pluginKey] === 'undefined') {
+			// throw Error(`Certbot plugin ${pluginKey} not found`);
+			throw new error.ItemNotFoundError(pluginKey);
+		}
+
+		const plugin = dnsPlugins[pluginKey];
+		logger.start(`Installing ${pluginKey}...`);
+
+		plugin.version      = plugin.version.replace(/{{certbot-version}}/g, CERTBOT_VERSION_REPLACEMENT);
+		plugin.dependencies = plugin.dependencies.replace(/{{certbot-version}}/g, CERTBOT_VERSION_REPLACEMENT);
+
+		const cmd = '. /opt/certbot/bin/activate && pip install --no-cache-dir ' + plugin.dependencies + ' ' + plugin.package_name + plugin.version + ' ' + ' && deactivate';
+		return utils.exec(cmd)
+			.then((result) => {
+				logger.complete(`Installed ${pluginKey}`);
+				return result;
+			})
+			.catch((err) => {
+				throw err;
+			});
+	},
+};
+
+module.exports = certbot;