feat(schema): Add content_type to DataService

This is used to parse data

see #61 (closed)

frontend/src/components/DataServiceForm.tsx

@@ -127,4 +127,5 @@
           </Stack>
           <Controller
             name="content_type"
+            rules={{ required: true }}
             render={({ field, fieldState: { error } }) => (
@@ -130,4 +131,4 @@
             render={({ field, fieldState: { error } }) => (
-              <>
+              <FormControl fullWidth>
                 <InputLabel id="mimetype-select-label">Mimetype</InputLabel>
                 <Select
@@ -132,4 +133,6 @@
                 <InputLabel id="mimetype-select-label">Mimetype</InputLabel>
                 <Select
+                  labelId="mimetype-select-label"
+                  label="Mimetype"
                   disabled={loading}
                   error={error !== undefined}
@@ -134,6 +137,5 @@
                   disabled={loading}
                   error={error !== undefined}
-                  labelId="mimetype-select-label"
                   defaultValue="text/turtle"
                   {...field}
                 >
@@ -145,7 +147,7 @@
                   <MenuItem value="application/trig">trig</MenuItem>
                   <MenuItem value="application/ld+json">json-ld</MenuItem>
                 </Select>
-              </>
+              </FormControl>
             )}
           />
           <Controller