feat: add ability to configure application with a config file (#740)

* add config file possibility

* revert port in docker compose

* Update docker-compose.yml

Co-authored-by: Elias Schneider <login@eliasschneider.com>

* Update docker-compose.yml

Co-authored-by: Elias Schneider <login@eliasschneider.com>

* add attribute description to config file

* remove email message config

* add package to resolve errors

* remove email messages from config

* move config initialization to config module

* revert unnecessary change

* add order

* improve alert

* run formatter

* remove unnecessary packages

* remove unnecessary types

* use logger

* don't save yaml config to db

* allowEdit if no yaml config is set

* improve docs

* fix allow edit state

* remove unnecessary check and refactor code

* restore old config file

* add script that generates `config.example.yaml` automatically

* allow config variables to be changed if they are not set in the `config.yml`

* add back init user

* Revert "allow config variables to be changed if they are not set in the `config.yml`"

This reverts commit 7dbdb6729034be5b083f126f854d5e1411735a54.

* improve info box text

---------

Co-authored-by: Elias Schneider <login@eliasschneider.com>

frontend/src/pages/admin/config/[category].tsx

@@ -1,4 +1,5 @@
 import {
+  Alert,
   AppShell,
   Box,
   Button,
@@ -13,6 +14,7 @@ import { useMediaQuery } from "@mantine/hooks";
 
 import { useRouter } from "next/router";
 import { useEffect, useState } from "react";
+import { TbInfoCircle } from "react-icons/tb";
 import { FormattedMessage } from "react-intl";
 import Meta from "../../../components/Meta";
 import AdminConfigInput from "../../../components/admin/configuration/AdminConfigInput";
@@ -46,6 +48,10 @@ export default function AppShellDemo() {
 
   const [logo, setLogo] = useState<File | null>(null);
 
+  const isEditingAllowed = (): boolean => {
+    return !configVariables || configVariables[0].allowEdit;
+  };
+
   const saveConfigVariables = async () => {
     if (logo) {
       configService
@@ -132,6 +138,17 @@ export default function AppShellDemo() {
           ) : (
             <>
               <Stack>
+                {!isEditingAllowed() && (
+                  <Alert
+                    mb={"lg"}
+                    variant="light"
+                    color="primary"
+                    title={t("admin.config.config-file-warning.title")}
+                    icon={<TbInfoCircle />}
+                  >
+                    <FormattedMessage id="admin.config.config-file-warning.description" />
+                  </Alert>
+                )}
                 <Title mb="md" order={3}>
                   {t("admin.config.category." + categoryId)}
                 </Title>