Minimum password length + Static Pages fixes (#11474)

* password min length: server + client side registering

* tweak text, add tests

* misc

* use red border for invalid inputs

* fix auth form for groups

* remove default firefox box shadown on invalid elements

* fix css in authForm

* fix margings

* misc fixes to forms and buttons

* fix typo

website/server/libs/auth/index.js

@@ -93,8 +93,13 @@ async function registerLocal (req, res, { isV3 = false }) {
     },
     password: {
       notEmpty: true,
+
       errorMessage: res.t('missingPassword'),
       equals: { options: [req.body.confirmPassword], errorMessage: res.t('passwordConfirmationMatch') },
+      isLength: {
+        options: { min: common.constants.MINIMUM_PASSWORD_LENGTH },
+        errorMessage: res.t('minPasswordLength'),
+      },
     },
   });