mail: move dkim keys into the database

src/domains.js

@@ -147,6 +147,8 @@ async function add(domain, data, auditSource) {
     let error = validateTlsConfig(tlsConfig, provider);
     if (error) throw error;
 
+    const dkimKey = await mail.generateDkimKey();
+
     if (!dkimSelector) {
         // create a unique suffix. this lets one add this domain can be added in another cloudron instance and not have their dkim selector conflict
         const suffix = crypto.createHash('sha256').update(settings.dashboardDomain()).digest('hex').substr(0, 6);
@@ -159,7 +161,7 @@ async function add(domain, data, auditSource) {
     let queries = [
         { query: 'INSERT INTO domains (domain, zoneName, provider, configJson, tlsConfigJson, fallbackCertificateJson) VALUES (?, ?, ?, ?, ?, ?)',
             args: [ domain, zoneName, provider, JSON.stringify(result.sanitizedConfig), JSON.stringify(tlsConfig), JSON.stringify(fallbackCertificate) ] },
-        { query: 'INSERT INTO mail (domain, dkimSelector) VALUES (?, ?)', args: [ domain, dkimSelector || 'cloudron' ] },
+        { query: 'INSERT INTO mail (domain, dkimKeyJson, dkimSelector) VALUES (?, ?, ?)', args: [ domain, JSON.stringify(dkimKey), dkimSelector || 'cloudron' ] },
     ];
 
     [error] = await safe(database.transaction(queries));