Make environment of migrate job identical to the regular web container deployment, as it should be.

templates/migrate-job.yaml

@@ -39,26 +39,20 @@ spec:
         {{- end }}
         command: {{ .Values.migrationJob.command | default (list "./manage.py" "migrate") | toJson }}
         env:
-          - name: DEBUG
-            value: "False"
-{{- if .Values.env.secret.DATABASE_URL }}
-          - name: DATABASE_URL
-            value: {{ .Values.env.secret.DATABASE_URL }}
-{{- end }}
 {{- if .Values.postgresql.enabled }}
           - name: DATABASE_PASSWORD
             valueFrom:
               secretKeyRef:
                 name: {{ default (include "django.postgresql.fullname" .) .Values.postgresql.auth.existingSecret }}
                 key: postgres-password
-{{- end }}
-          - name: SECRET_KEY
-            value: {{ required "env.secret.SECRET_KEY is a required value." .Values.env.secret.SECRET_KEY }}
-        {{- range $k, $v := .Values.env.normal }}
-          - name: {{ $k }}
-            value: {{ $v | quote }}
 {{- end }}
         envFrom:
+          - secretRef:
+              name: {{ include "django.fullname" . }}
+          {{- if .Values.existingSecret }}
+          - secretRef:
+              name: {{ .Values.existingSecret }}
+          {{- end }}
           - configMapRef:
               name: {{ include "django.fullname" . }}
         {{- with .Values.extraVolumeMounts }}