fix multiple issues from user exports config changes

- improve nginx config
- fix DATA_UPLOAD_MAX_MEMORY_SIZE default not being an int
- translate fallback value in id_to_username template tag
- make location of setting to turn on user exports easier to locate for admins

fixes #3227
fixes #3231
fixes #3232
fixes #3236

bookwyrm/settings.py

@@ -443,4 +443,4 @@ if HTTP_X_FORWARDED_PROTO:
 # user with the same username - in which case you should change it!
 INSTANCE_ACTOR_USERNAME = "bookwyrm.instance.actor"
 
-DATA_UPLOAD_MAX_MEMORY_SIZE = env.int("DATA_UPLOAD_MAX_MEMORY_SIZE", (1024**2 * 100))
+DATA_UPLOAD_MAX_MEMORY_SIZE = env.int("DATA_UPLOAD_MAX_MEMORY_SIZE", 104857600)

bookwyrm/templates/preferences/export-user.html

@@ -49,6 +49,13 @@
     {% if not site.user_exports_enabled %}
     <p class="notification is-danger">
         {% trans "New user exports are currently disabled." %}
+        {% if perms.bookwyrm.edit_instance_settings %}
+        {% spaceless %}
+        {% blocktrans%}
+            <br/>User exports settings can be changed from <a href="/settings/imports">the Imports page</a> in the Admin dashboard.
+        {% endblocktrans %}
+        {% endspaceless %}
+    {% endif%}
     </p>
     {% elif next_available %}
     <p class="notification is-warning">

bookwyrm/templatetags/utilities.py

@@ -126,7 +126,7 @@ def id_to_username(user_id):
         value = f"{name}@{domain}"
 
         return value
-    return "a new user account"
+    return _("a new user account")
 
 
 @register.filter(name="get_file_size")