fix #216. Add base5

encode. Also add cypress.

cypress/e2e/pasteUrlLoginRedirect.cy.js

@@ -0,0 +1,17 @@
+const urlUnderTest = `https://REDACTED-HOST/login?return-to=aHR0cHM6Ly9sdWNpYS1kZXYuZHNwLmltL2Rpc2NvdmVyL2NvbmZvcm1hbmNlL2xvZy8xODU1MjQ3OTcvY29uZm9ybWFuY2U=`;
+describe('Conformance', ()=>{
+  beforeEach(() => {
+    cy.visit(urlUnderTest);
+  });
+
+  it('After pasting discover/conformance/log/ page, frontend should redirect to corresponding\
+    page, not login page', () => {
+        cy.get('#account').clear().type(`   ${Cypress.env('user').username}   `);
+        cy.get('#password').clear().type(`   ${Cypress.env('user').password}   `);
+        cy.get('.btn-lg').click();
+        cy.get('form').submit();
+
+        cy.contains('Conformance Checking Results').should('be.visible');
+  })
+
+  });