Allow more detailed configuration of upload mime types

Fixes #637

Signed-off-by: Sheogorath <sheogorath@shivering-isles.com>

lib/config/index.js

@@ -97,6 +97,26 @@ config.isLDAPEnable = config.ldap.url
 config.isSAMLEnable = config.saml.idpSsoUrl
 config.isPDFExportEnable = config.allowpdfexport
 
+// figure out mime types for image uploads
+switch (config.imageUploadType) {
+  case 'imgur':
+    config.allowedUploadMimeTypes = [
+      'image/jpeg',
+      'image/png',
+      'image/jpg',
+      'image/gif'
+    ]
+    break
+  default:
+    config.allowedUploadMimeTypes = [
+      'image/jpeg',
+      'image/png',
+      'image/jpg',
+      'image/gif',
+      'image/svg+xml'
+    ]
+}
+
 // generate correct path
 config.sslcapath.forEach(function (capath, i, array) {
   array[i] = path.resolve(appRootPath, capath)