fix: coolify nixpacks upload permissions

kemiskinan/nixpacks.toml

@@ -0,0 +1,5 @@
+[phases.build]
+cmds = [
+    "mkdir -p /app/uploads",
+    "chmod -R 777 /app/uploads"
+]

nixpacks.toml

@@ -0,0 +1,5 @@
+[phases.build]
+cmds = [
+    "mkdir -p /app/kemiskinan/uploads",
+    "chmod -R 777 /app/kemiskinan/uploads"
+]