fix(server): allow files without mimetype to be uploaded

src/services/__tests__/fileStorage.service.test.js

@@ -47,6 +47,22 @@ describe('File Storage Service', () => {
     expect(storedObject).toHaveLength(1)
   })
 
+  it('uploads a not common extension file', async () => {
+    const filePath = path.join(
+      process.cwd(),
+      'src',
+      'services',
+      '__tests__',
+      'files',
+      'entry.njk',
+    )
+
+    const fileStream = fs.createReadStream(filePath)
+    const storedObject = await upload(fileStream, 'entry.njk')
+    expect(storedObject).toHaveLength(1)
+    expect(storedObject[0].mimetype).toBe('application/octet-stream')
+  })
+
   it('uploads an jpg image file', async () => {
     const filePath = path.join(
       process.cwd(),

src/services/__tests__/files/entry.njk

+---
+pagination:
+  data: articleQuery.articles
+  size: 1
+  alias: article
+layout: article-preview.njk
+class: article-preview
+permalink: "/articles/{{article.shortId}}/index.html"
+---
\ No newline at end of file

src/services/fileStorage.js

@@ -377,7 +377,7 @@ const upload = async (fileStream, filename, options = {}) => {
 
     const { forceObjectKeyValue } = options
 
-    const mimetype = mime.lookup(filename)
+    const mimetype = mime.lookup(filename) || 'application/octet-stream'
     let storedObjects = []
 
     const hashedFilename =