add getStaticProps to use static optimization

src/pages/404.tsx

@@ -1,5 +1,5 @@
 import React from "react";
-import { NextPage } from "next";
+import { NextPage, GetStaticProps } from "next";
 import Head from "next/head";
 import styled from "styled-components";
 
@@ -25,4 +25,6 @@ const NotFoundPage: NextPage = () => (
   </>
 );
 
+export const getStaticProps: GetStaticProps = async () => ({ props: {} });
+
 export default NotFoundPage;

src/pages/admin/events/index.tsx

@@ -1,5 +1,5 @@
 import React from "react";
-import { NextPage } from "next";
+import { NextPage, GetStaticProps } from "next";
 import { formatRelative } from "date-fns";
 import { toast } from "react-toastify";
 import styled from "styled-components";
@@ -75,4 +75,6 @@ const AdminEventPage: NextPage = () => {
   );
 };
 
+export const getStaticProps: GetStaticProps = async () => ({ props: {} });
+
 export default AdminEventPage;

src/pages/admin/feed/index.tsx

@@ -1,5 +1,5 @@
 import React from "react";
-import { NextPage } from "next";
+import { NextPage, GetStaticProps } from "next";
 import { formatRelative } from "date-fns";
 import { toast } from "react-toastify";
 import styled from "styled-components";
@@ -75,4 +75,6 @@ const AdminFeedPage: NextPage = () => {
   );
 };
 
+export const getStaticProps: GetStaticProps = async () => ({ props: {} });
+
 export default AdminFeedPage;

src/pages/admin/index.tsx

@@ -1,5 +1,5 @@
 import React from "react";
-import { NextPage } from "next";
+import { NextPage, GetStaticProps } from "next";
 import Head from "next/head";
 import AdminPageWrapper from "@views/common/AdminPageWrapper";
 
@@ -16,4 +16,6 @@ const AdminFrontPage: NextPage = () => (
   </>
 );
 
+export const getStaticProps: GetStaticProps = async () => ({ props: {} });
+
 export default AdminFrontPage;

src/pages/admin/jobads/index.tsx

@@ -1,5 +1,5 @@
 import React from "react";
-import { NextPage } from "next";
+import { NextPage, GetStaticProps } from "next";
 import { formatRelative } from "date-fns";
 import { toast } from "react-toastify";
 import styled from "styled-components";
@@ -79,4 +79,6 @@ const AdminJobAdPage: NextPage = () => {
   );
 };
 
+export const getStaticProps: GetStaticProps = async () => ({ props: {} });
+
 export default AdminJobAdPage;

src/pages/admin/login.tsx

@@ -1,5 +1,5 @@
 import React, { useState, useEffect } from "react";
-import { NextPage } from "next";
+import { NextPage, GetStaticProps } from "next";
 import { useRouter } from "next/router";
 import styled from "styled-components";
 import { generateToken, setTokenCookie, isAuthenticated } from "@utils/auth";
@@ -80,4 +80,6 @@ const AdminLoginPage: NextPage = () => {
   );
 };
 
+export const getStaticProps: GetStaticProps = async () => ({ props: {} });
+
 export default AdminLoginPage;

src/pages/admin/logout.tsx

@@ -1,4 +1,4 @@
-import { NextPage } from "next";
+import { NextPage, GetStaticProps } from "next";
 import { useRouter } from "next/router";
 import { deleteTokenCookie } from "@utils/auth";
 
@@ -12,4 +12,6 @@ const AdminLogoutPage: NextPage = () => {
   return null;
 };
 
+export const getStaticProps: GetStaticProps = async () => ({ props: {} });
+
 export default AdminLogoutPage;

src/pages/admin/signups/index.tsx

@@ -1,5 +1,5 @@
 import React, { useEffect, useState } from "react";
-import { NextPage } from "next";
+import { NextPage, GetStaticProps } from "next";
 import { formatRelative } from "date-fns";
 import { toast } from "react-toastify";
 import styled from "styled-components";
@@ -84,4 +84,6 @@ const AdminSignupPage: NextPage = () => {
   );
 };
 
+export const getStaticProps: GetStaticProps = async () => ({ props: {} });
+
 export default AdminSignupPage;

src/pages/kilta/fuksi.tsx

@@ -1,5 +1,5 @@
 import React from "react";
-import { NextPage } from "next";
+import { NextPage, GetStaticProps } from "next";
 import Head from "next/head";
 import FreshmenPageView from "@views/FreshmenPage/FreshmenPageView";
 import PageWrapper from "@views/common/PageWrapper";
@@ -15,4 +15,6 @@ const FreshmenPage: NextPage = () => (
   </>
 );
 
+export const getStaticProps: GetStaticProps = async () => ({ props: {} });
+
 export default FreshmenPage;

src/pages/kilta/index.tsx

@@ -1,5 +1,5 @@
 import React from "react";
-import { NextPage } from "next";
+import { NextPage, GetStaticProps } from "next";
 import Head from "next/head";
 import GuildPageView from "@views/GuildPage/GuildPageView";
 import PageWrapper from "@views/common/PageWrapper";
@@ -15,4 +15,6 @@ const GuildPage: NextPage = () => (
   </>
 );
 
+export const getStaticProps: GetStaticProps = async () => ({ props: {} });
+
 export default GuildPage;

src/pages/kilta/kunnia.tsx

@@ -1,5 +1,5 @@
 import React from "react";
-import { NextPage } from "next";
+import { NextPage, GetStaticProps } from "next";
 import Head from "next/head";
 import HonoraryPageView from "@views/HonoraryPage/HonoraryPageView";
 import PageWrapper from "@views/common/PageWrapper";
@@ -15,4 +15,6 @@ const HonoraryPage: NextPage = () => (
   </>
 );
 
+export const getStaticProps: GetStaticProps = async () => ({ props: {} });
+
 export default HonoraryPage;

src/pages/opinnot_ja_ura.tsx

@@ -1,5 +1,5 @@
 import React from "react";
-import { NextPage } from "next";
+import { NextPage, GetStaticProps } from "next";
 import Head from "next/head";
 import StudiesPageView from "@views/StudiesPage/StudiesPageView";
 import PageWrapper from "@views/common/PageWrapper";
@@ -15,4 +15,6 @@ const StudiesPage: NextPage = () => (
   </>
 );
 
+export const getStaticProps: GetStaticProps = async () => ({ props: {} });
+
 export default StudiesPage;

src/pages/yhteystiedot.tsx

@@ -1,5 +1,5 @@
 import React from "react";
-import { NextPage } from "next";
+import { NextPage, GetStaticProps } from "next";
 import Head from "next/head";
 import ContactsPageView from "@views/ContactsPage/ContactsPageView";
 import PageWrapper from "@views/common/PageWrapper";
@@ -15,4 +15,6 @@ const ContactsPage: NextPage = () => (
   </>
 );
 
+export const getStaticProps: GetStaticProps = async () => ({ props: {} });
+
 export default ContactsPage;