chore: Add release namespace as the default namespace

Author: yashmehrotra

chart/templates/deployment.yaml

@@ -49,6 +49,8 @@ spec:
                 secretKeyRef:
                   name: {{ .Values.db.secretKeyRef.name }}
                   key: {{ .Values.db.secretKeyRef.key }}
+            - name: NAMESPACE
+              valueFrom: {{ .Values.namespace | default .Release.Namespace }}
           resources:
             {{- toYaml .Values.resources | nindent 12 }}
       {{- with .Values.extra }}