Rest framework (#24)

* Add rest framework for API: First Commit

* modify some shell scripts to make variable references safer; modify some python scripts to reduce the code complexity and cyclomatic complexity of functions.

* Add REST API for some webvirtcloud functions. Instance list/delete/create, compute list/delete/create, storages-network list/retrieve. Add swagger and redoc for API interface

* update requirements

Co-authored-by: herengui <herengui@uniontech.com>

networks/api/serializers.py

@@ -0,0 +1,19 @@
+
+from rest_framework import serializers
+from networks.models import Networks
+
+
+class NetworksSerializer(serializers.ModelSerializer):
+        
+    class Meta:
+        model = Networks
+        fields = ['name', 'status', 'device', 'forward'] 
+
+
+
+# class VolumeSerializer(serializers.ModelSerializer):
+#     allocation = serializers.ReadOnlyField()
+#     meta_prealloc = serializers.BooleanField(write_only=True)
+#     class Meta:
+#         model = Volume
+#         fields = ['name', 'type', 'allocation', 'size', 'meta_prealloc']