#395 - require is not defined

Add support for @angular-builders/custom-webpack
Setup environment target based on env params
Remove direct code changeing scripts postinstall/postinstall-web

angular.webpack.js

@@ -0,0 +1,24 @@
+/**
+ * Custom angular webpack configuration
+ */
+
+module.exports = (config, options) => {
+    config.target = 'electron-renderer';
+    if (options.customWebpackConfig.target) {
+        config.target = options.customWebpackConfig.target;
+    } else if (options.fileReplacements) {
+        for(let fileReplacement of options.fileReplacements) {
+            if (fileReplacement.replace !== 'src/environments/environment.ts') {
+                continue;
+            }
+
+            let fileReplacementParts = fileReplacement['with'].split('.');
+            if (['dev', 'prod', 'test', 'electron-renderer'].indexOf(fileReplacementParts[1]) < 0) {
+                config.target = fileReplacementParts[1];
+            }
+            break;
+        }
+    }
+
+    return config;
+}