add support for server side http proxy, close #240

modules/axios-proxy.js

@@ -0,0 +1,26 @@
+const HttpsProxyAgent = require("https-proxy-agent"),
+      axios = require("axios"),
+      config = require('../server/config')
+
+function axiosProxy (_moduleOptions) {
+
+  if (config.proxy && !(!config.proxy.hostname && !config.proxy.host)) {
+    const httpsAgent = new HttpsProxyAgent({
+      protocol: config.proxy.protocol,
+      hostname: config.proxy.hostname,
+      host: config.proxy.host, 
+      port: config.proxy.port, 
+      auth: config.proxy.auth.username + ':' + config.proxy.auth.password,
+      headers: config.proxy.headers 
+    })
+
+    // Use axios as you normally would, but specify httpsAgent in the default configs
+    // https://github.com/nuxt-community/axios-module/pull/428#issuecomment-743313813
+    // Nuxt 2: https://github.com/axios/axios/issues/925#issuecomment-513028175
+    // Nuxt 3: https://github.com/unjs/ofetch#-adding-https-agent
+    axios.defaults.httpsAgent = httpsAgent
+  }
+
+}
+
+module.exports = axiosProxy