feat: Remove unused code related to nginx (#2377)

## Objective
We don't use nginx for redirects. Redirects are handled through: https://docs.sentry.io/contributing/pages/redirects/

So in this PR, unused code related to nginx and its' redirects should be removed.

Consensus is that the Dockerfile is not necessary, so it will be also removed in this PR.

## Test Plan
Check the Vercel preview build to make sure redirects did not break.

Author: NisanthanNanthakumar

Dockerfile

@@ -60,7 +60,6 @@
     "gatsby-transformer-yaml": "^2.4.8",
     "gray-matter": "^4.0.2",
     "jsdom": "^16.3.0",
-    "nginx-conf": "^1.5.0",
     "node-sass": "^4.14.1",
     "platformicons": "^3.1.0",
     "prismjs": "^1.20.0",

package.json

@@ -184,13 +184,7 @@ const getPlugins = () => {
         path: `${root}/src/data`,
       },
     },
-    {
-      resolve: `./src/gatsby/plugins/gatsby-redirects`,
-      options: {
-        inputConfigFile: `${root}/nginx.conf`,
-        outputConfigFile: `${root}/nginx.out.conf`,
-      },
-    },
+    { resolve: `./src/gatsby/plugins/gatsby-redirects` },
     {
       resolve: `./src/gatsby/plugins/gatsby-plugin-openapi`,
       options: {
@@ -204,8 +198,7 @@ const getPlugins = () => {
         // required, function which returns a Promise resolving Swagger JSON
       },
     },
-    // generate normal redirects so when you're running without nginx
-    // you receive similar behavior
+    // used to generate clident-side redirects for markdown redirect_from
     `gatsby-plugin-meta-redirect`,
     process.env.ALGOLIA_INDEX === "1" && {
       resolve: `gatsby-plugin-algolia`,

src/gatsby/config.ts

@@ -1,5 +1,3 @@
-const { NginxConfFile } = require("nginx-conf");
-const { remove } = require("fs-extra");
 const { resolve } = require("url");
 
 exports.onCreatePage = ({ page, reporter, actions: { createRedirect } }) => {
@@ -16,42 +14,3 @@ exports.onCreatePage = ({ page, reporter, actions: { createRedirect } }) => {
     });
   }
 };
-
-// based on https://github.com/gimoteco/gatsby-plugin-nginx-redirect
-exports.onPostBuild = async (
-  { store, reporter },
-  { inputConfigFile, outputConfigFile }
-) => {
-  const { redirects } = store.getState();
-
-  NginxConfFile.create(inputConfigFile, async function(err, conf) {
-    if (err) {
-      console.error(err);
-      return;
-    }
-
-    await conf.die(inputConfigFile);
-    await conf.flush();
-
-    // this assumes a partial nginx config which lives _inside_ of a server
-    // directive
-    redirects.forEach(redirect => {
-      let fromPath = redirect.fromPath;
-      if (fromPath.slice(fromPath.length - 1) !== "/") fromPath += "/";
-      conf.nginx._add(
-        "rewrite",
-        `^${fromPath}?$ ${redirect.toPath} ${
-          redirect.isPermanent ? "permanent" : "redirect"
-        }`
-      );
-    });
-
-    await remove(outputConfigFile);
-    await conf.live(outputConfigFile);
-    await conf.write();
-
-    reporter.info(
-      `Added ${redirects.length} redirect(s) to ${outputConfigFile}`
-    );
-  });
-};

src/gatsby/plugins/gatsby-redirects/gatsby-node.js

@@ -12669,11 +12669,6 @@ next-tick@^1.0.0:
   resolved "https://registry.yarnpkg.com/next-tick/-/next-tick-1.1.0.tgz#1836ee30ad56d67ef281b22bd199f709449b35eb"
   integrity sha512-CXdUiJembsNjuToQvxayPZF9Vqht7hewsvy2sOWafLvi2awflj9mOC6bHIg50orX8IJvWKY9wYQ/zB2kogPslQ==
 
-nginx-conf@^1.5.0:
-  version "1.5.0"
-  resolved "https://registry.yarnpkg.com/nginx-conf/-/nginx-conf-1.5.0.tgz#30de1a0a0a195ed906b9cfb130ed7b950cda416d"
-  integrity sha512-bzVqdmATU1U9dNn9T9NVoczRJArydh6rGMxg9f8gLhzsPdQkGDqD8H1EcERgeKoLH3UC9mPiDTR6eyi2uDn/kQ==
-
 nice-try@^1.0.4:
   version "1.0.5"
   resolved "https://registry.yarnpkg.com/nice-try/-/nice-try-1.0.5.tgz#a3378a7696ce7d223e88fc9b764bd7ef1089e366"