🧑‍💻(docker) split frontend to another file

This commit aims at improving the user experience:
- Use a dedicated `Dockerfile` for the frontend
- Run the backend and frontend in "watch"/dev mode in Docker
- Do not start all Docker instances for small tasks

src/frontend/apps/desk/conf/default.conf

@@ -1,4 +1,5 @@
 server {
+  listen 3000;
   listen 8080;
   server_name localhost;
   server_tokens off;

src/frontend/apps/e2e/__tests__/app-desk/mail-domain.spec.ts

@@ -97,6 +97,7 @@ test.describe('Mail domain', () => {
     });
 
     await page.goto('/mail-domains/unknown-domain.fr');
+    await page.waitForURL('/404/');
     await expect(
       page.getByText(
         'It seems that the page you are looking for does not exist or cannot be displayed correctly.',

src/frontend/apps/e2e/__tests__/app-desk/mail-domains-add.spec.ts

@@ -101,6 +101,8 @@ test.describe('Add Mail Domains', () => {
   test('checks 404 on mail-domains/[slug] page', async ({ page }) => {
     await page.goto('/mail-domains/unknown-domain');
 
+    await page.waitForURL('/404/');
+
     await expect(
       page.getByText(
         'It seems that the page you are looking for does not exist or cannot be displayed correctly.',

src/frontend/apps/e2e/__tests__/app-desk/teams-create.spec.ts

@@ -83,6 +83,7 @@ test.describe('Teams Create', () => {
 
   test('checks 404 on teams/[id] page', async ({ page }) => {
     await page.goto('/teams/some-unknown-team');
+    await page.waitForURL('/404/');
     await expect(
       page.getByText(
         'It seems that the page you are looking for does not exist or cannot be displayed correctly.',

src/frontend/apps/e2e/playwright.config.ts

@@ -32,12 +32,10 @@ export default defineConfig({
   },
 
   webServer: {
-    command: `cd ../.. && yarn app:${
-      process.env.CI ? 'start -p ' : 'dev --port '
-    } ${PORT}`,
+    command: !process.env.CI ? `cd ../.. && yarn app:dev --port ${PORT}` : '',
     url: baseURL,
     timeout: 120 * 1000,
-    reuseExistingServer: !process.env.CI,
+    reuseExistingServer: true,
   },
 
   /* Configure projects for major browsers */