server stack seems to work. Graphql does not load properly yet

backend/package.json

@@ -7,11 +7,21 @@
   "author": "Ulf Gebhardt",
   "license": "MIT",
   "private": false,
+  "scripts": {
+    "start": "nodemon -w src --ext ts --exec ts-node src/index.ts"
+  },
   "dependencies": {
     "express": "^4.17.1",
     "express-graphql": "^0.12.0",
+    "graphql": "^15.5.1",
     "reflect-metadata": "^0.1.13",
     "type-graphql": "^1.1.1",
     "typeorm": "^0.2.34"
+  },
+  "devDependencies": {
+    "@types/express": "^4.17.12",
+    "nodemon": "^2.0.7",
+    "ts-node": "^10.0.0",
+    "typescript": "^4.3.4"
   }
 }

backend/src/graphql/resolvers.ts

@@ -0,0 +1 @@
+export default []

backend/src/index.ts

@@ -0,0 +1,65 @@
+import 'reflect-metadata'
+import express from 'express'
+import { graphqlHTTP } from 'express-graphql'
+import { createConnection } from 'typeorm'
+import { buildSchema } from 'type-graphql'
+// import resolvers from './graphql/resolvers'
+const resolvers: [string] = ['']
+// import queryComplexity, { simpleEstimator, fieldConfigEstimator } from "graphql-query-complexity";
+
+async function main() {
+  //const connection = await createConnection()
+  const schema = await buildSchema({
+      resolvers
+  })
+  const server = express();
+
+  server.use('/api',
+    graphqlHTTP({
+      schema,
+      graphiql: true,
+      validationRules: [
+      /**
+       * This provides GraphQL query analysis to reject complex queries to your GraphQL server.
+       * This can be used to protect your GraphQL servers
+       * against resource exhaustion and DoS attacks.
+       * More documentation can be found (here)[https://github.com/ivome/graphql-query-complexity]
+       */
+      /*queryComplexity({
+        // The maximum allowed query complexity, queries above this threshold will be rejected
+        maximumComplexity: 20,
+        // The query variables. This is needed because the variables are not available
+        // in the visitor of the graphql-js library
+        variables: params!.variables!,
+        // Optional callback function to retrieve the determined query complexity
+        // Will be invoked weather the query is rejected or not
+        // This can be used for logging or to implement rate limiting
+        onComplete: (complexity: number) => {
+          console.log("Query Complexity:", complexity);
+        },
+        // Add any number of estimators. The estimators are invoked in order, the first
+        // numeric value that is being returned by an estimator is used as the field complexity.
+        // If no estimator returns a value, an exception is raised.
+        estimators: [
+          fieldConfigEstimator(),
+          // Add more estimators here...
+          // This will assign each field a complexity of 1 if no other estimator
+          // returned a value.
+          simpleEstimator({
+            defaultComplexity: 1,
+          }),
+        ],
+      }),*/
+    ],
+    })
+  )
+
+  // app.get("/playground", expressPlayground({ endpoint: "/graphql" }));
+  server.listen(4000, () => {
+    console.log(
+      `Server is running, GraphQL Playground available at http://localhost:4000/playground`,
+    );
+  });
+}
+
+main()

backend/tsconfig.json

@@ -0,0 +1,73 @@
+{
+  "compilerOptions": {
+    /* Visit https://aka.ms/tsconfig.json to read more about this file */
+
+    /* Basic Options */
+    // "incremental": true,                         /* Enable incremental compilation */
+    "target": "es5",                                /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019', 'ES2020', 'ES2021', or 'ESNEXT'. */
+    "module": "commonjs",                           /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', 'es2020', or 'ESNext'. */
+    // "lib": [],                                   /* Specify library files to be included in the compilation. */
+    // "allowJs": true,                             /* Allow javascript files to be compiled. */
+    // "checkJs": true,                             /* Report errors in .js files. */
+    // "jsx": "preserve",                           /* Specify JSX code generation: 'preserve', 'react-native', 'react', 'react-jsx' or 'react-jsxdev'. */
+    // "declaration": true,                         /* Generates corresponding '.d.ts' file. */
+    // "declarationMap": true,                      /* Generates a sourcemap for each corresponding '.d.ts' file. */
+    // "sourceMap": true,                           /* Generates corresponding '.map' file. */
+    // "outFile": "./",                             /* Concatenate and emit output to single file. */
+    // "outDir": "./",                              /* Redirect output structure to the directory. */
+    // "rootDir": "./",                             /* Specify the root directory of input files. Use to control the output directory structure with --outDir. */
+    // "composite": true,                           /* Enable project compilation */
+    // "tsBuildInfoFile": "./",                     /* Specify file to store incremental compilation information */
+    // "removeComments": true,                      /* Do not emit comments to output. */
+    // "noEmit": true,                              /* Do not emit outputs. */
+    // "importHelpers": true,                       /* Import emit helpers from 'tslib'. */
+    // "downlevelIteration": true,                  /* Provide full support for iterables in 'for-of', spread, and destructuring when targeting 'ES5' or 'ES3'. */
+    // "isolatedModules": true,                     /* Transpile each file as a separate module (similar to 'ts.transpileModule'). */
+
+    /* Strict Type-Checking Options */
+    "strict": true,                                 /* Enable all strict type-checking options. */
+    // "noImplicitAny": true,                       /* Raise error on expressions and declarations with an implied 'any' type. */
+    // "strictNullChecks": true,                    /* Enable strict null checks. */
+    // "strictFunctionTypes": true,                 /* Enable strict checking of function types. */
+    // "strictBindCallApply": true,                 /* Enable strict 'bind', 'call', and 'apply' methods on functions. */
+    // TODO: "strictPropertyInitialization": false
+    // "strictPropertyInitialization": true,        /* Enable strict checking of property initialization in classes. */
+    // "noImplicitThis": true,                      /* Raise error on 'this' expressions with an implied 'any' type. */
+    // "alwaysStrict": true,                        /* Parse in strict mode and emit "use strict" for each source file. */
+
+    /* Additional Checks */
+    // "noUnusedLocals": true,                      /* Report errors on unused locals. */
+    // "noUnusedParameters": true,                  /* Report errors on unused parameters. */
+    // "noImplicitReturns": true,                   /* Report error when not all code paths in function return a value. */
+    // "noFallthroughCasesInSwitch": true,          /* Report errors for fallthrough cases in switch statement. */
+    // "noUncheckedIndexedAccess": true,            /* Include 'undefined' in index signature results */
+    // "noImplicitOverride": true,                  /* Ensure overriding members in derived classes are marked with an 'override' modifier. */
+    // "noPropertyAccessFromIndexSignature": true,  /* Require undeclared properties from index signatures to use element accesses. */
+
+    /* Module Resolution Options */
+    // "moduleResolution": "node",                  /* Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6). */
+    // "baseUrl": "./",                             /* Base directory to resolve non-absolute module names. */
+    // "paths": {},                                 /* A series of entries which re-map imports to lookup locations relative to the 'baseUrl'. */
+    // "rootDirs": [],                              /* List of root folders whose combined content represents the structure of the project at runtime. */
+    // "typeRoots": [],                             /* List of folders to include type definitions from. */
+    // "types": [],                                 /* Type declaration files to be included in compilation. */
+    // "allowSyntheticDefaultImports": true,        /* Allow default imports from modules with no default export. This does not affect code emit, just typechecking. */
+    "esModuleInterop": true,                        /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */
+    // "preserveSymlinks": true,                    /* Do not resolve the real path of symlinks. */
+    // "allowUmdGlobalAccess": true,                /* Allow accessing UMD globals from modules. */
+
+    /* Source Map Options */
+    // "sourceRoot": "",                            /* Specify the location where debugger should locate TypeScript files instead of source locations. */
+    // "mapRoot": "",                               /* Specify the location where debugger should locate map files instead of generated locations. */
+    // "inlineSourceMap": true,                     /* Emit a single file with source maps instead of having a separate file. */
+    // "inlineSources": true,                       /* Emit the source alongside the sourcemaps within a single file; requires '--inlineSourceMap' or '--sourceMap' to be set. */
+
+    /* Experimental Options */
+    "experimentalDecorators": true,                 /* Enables experimental support for ES7 decorators. */
+    "emitDecoratorMetadata": true,                  /* Enables experimental support for emitting type metadata for decorators. */
+
+    /* Advanced Options */
+    "skipLibCheck": true,                           /* Skip type checking of declaration files. */
+    "forceConsistentCasingInFileNames": true        /* Disallow inconsistently-cased references to the same file. */
+  }
+}