Application Icon upload (#341)

* core: add initial implementation for File Upload

* root: add volumes to docker-compose for file upload

* helm: add pvc for uploads

* core: allow meta_icon to be overwritten with static files

passbook/core/migrations/0015_application_icon.py

@@ -0,0 +1,24 @@
+# Generated by Django 3.1.3 on 2020-11-23 17:19
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("passbook_core", "0014_auto_20201018_1158"),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name="application",
+            name="meta_icon_url",
+        ),
+        migrations.AddField(
+            model_name="application",
+            name="meta_icon",
+            field=models.FileField(
+                blank=True, default="", upload_to="application-icons/"
+            ),
+        ),
+    ]