Move axios config and setup interceptor.

src/api/axios/configDjangoCookieName.ts

+import axios from 'axios';
+
+/**
+ * Config for django compatibility.
+ */
+export const configDjangoCookieName = (): void => {
+  axios.defaults.xsrfHeaderName = 'X-CSRFTOKEN';
+  axios.defaults.xsrfCookieName = 'csrftoken';
+  axios.defaults.withCredentials = true;
+};

src/api/axios/configureInterceptors.ts

+import axios, { AxiosRequestConfig, AxiosResponse } from 'axios';
+import { camelizeKeys, decamelizeKeys } from 'humps';
+
+export const configureInterceptors = (): void => {
+  // Axios middleware to convert all api responses to camelCase
+  axios.interceptors.response.use((response: AxiosResponse) => {
+    if (
+      response.data &&
+      response.headers['content-type'] === 'application/json'
+    ) {
+      response.data = camelizeKeys(response.data);
+    }
+    return response;
+  });
+  // Axios middleware to convert all api requests to snake_case
+  axios.interceptors.request.use((config: AxiosRequestConfig) => {
+    const newConfig = { ...config };
+    if (config.data) {
+      newConfig.data = decamelizeKeys(config.data);
+    }
+    return newConfig;
+  });
+};