epic: first try at adding a backend

Kemkas.Web/frontend/aspnetcore-react.js

@@ -0,0 +1,55 @@
+// This script configures the .env.development.local file with additional environment variables to configure HTTPS using the ASP.NET Core
+// development certificate in the webpack development proxy.
+
+const fs = require('fs');
+const path = require('path');
+
+const baseFolder =
+  process.env.APPDATA !== undefined && process.env.APPDATA !== ''
+    ? `${process.env.APPDATA}/ASP.NET/https`
+    : `${process.env.HOME}/.aspnet/https`;
+
+const certificateArg = process.argv.map(arg => arg.match(/--name=(?<value>.+)/i)).filter(Boolean)[0];
+const certificateName = certificateArg ? certificateArg.groups.value : process.env.npm_package_name;
+
+if (!certificateName) {
+  console.error('Invalid certificate name. Run this script in the context of an npm/yarn script or pass --name=<<app>> explicitly.')
+  process.exit(-1);
+}
+
+const certFilePath = path.join(baseFolder, `${certificateName}.pem`);
+const keyFilePath = path.join(baseFolder, `${certificateName}.key`);
+
+if (!fs.existsSync('.env.development.local')) {
+  fs.writeFileSync(
+    '.env.development.local',
+`SSL_CRT_FILE=${certFilePath}
+SSL_KEY_FILE=${keyFilePath}`
+  );
+} else {
+  let lines = fs.readFileSync('.env.development.local')
+    .toString()
+    .split('\n');
+
+  let hasCert, hasCertKey = false;
+  for (const line of lines) {
+    if (/SSL_CRT_FILE=.*/i.test(line)) {
+      hasCert = true;
+    }
+    if (/SSL_KEY_FILE=.*/i.test(line)) {
+      hasCertKey = true;
+    }
+  }
+  if (!hasCert) {
+    fs.appendFileSync(
+      '.env.development.local',
+      `\nSSL_CRT_FILE=${certFilePath}`
+    );
+  }
+  if (!hasCertKey) {
+    fs.appendFileSync(
+      '.env.development.local',
+      `\nSSL_KEY_FILE=${keyFilePath}`
+    );
+  }
+}