feat: Add central error handler

Added:
- Added Midleware to capture and handle all errors
    - will catch error from `throw ...` and `next(...)`
- Added RequestError base error class to build consistent error objects
- Added common errors like `UnauthorizedRequestError`, `BadRequestError`
- Added consistent Logging solution using `winston`
    - Supports Loki Transporter using `winston-loki`
- Outputing Legal disclaimer to console when `TELEMETRY_ENABLED=true`

Changed:
- Changed console.log to getLogger() favor of using consistent logging

backend/src/services/PostHogClient.ts

@@ -5,8 +5,16 @@ import {
   POSTHOG_PROJECT_API_KEY,
   TELEMETRY_ENABLED
 } from '../config';
+import { getLogger } from '../utils/logger';
 
-console.log('TELEMETRY_ENABLED: ', TELEMETRY_ENABLED);
+if(TELEMETRY_ENABLED){
+  getLogger("backend-main").info([
+    "",
+    "Infisical collects telemetry data about general usage.",
+    "The data helps us understand how the product is doing and guide our product development to create the best possible platform; it also helps us demonstrate growth for investors as we support Infisical as open-source software.",
+    "To opt out of telemetry, you can set `TELEMETRY_ENABLED=false` within the environment variables",
+  ].join('\n'))
+}
 
 let postHogClient: any;
 if (NODE_ENV === 'production' && TELEMETRY_ENABLED) {

backend/src/services/database.ts

@@ -1,10 +1,10 @@
-/* eslint-disable no-console */
 import mongoose from 'mongoose';
+import { getLogger } from '../utils/logger';
 
 export const initDatabase = (MONGO_URL: string) => {
   mongoose
     .connect(MONGO_URL)
-    .then(() => console.log('Successfully connected to DB'))
-    .catch((e) => console.log('Failed to connect to DB ', e));
+    .then(() => getLogger("database").info("Database connection established"))
+    .catch((e) => getLogger("database").error(`Unable to establish Database connection due to the error.\n${e}`));
   return mongoose.connection;
 };

backend/src/services/health.ts

@@ -1,10 +1,10 @@
-/* eslint-disable no-console */
 import mongoose from 'mongoose';
 import { createTerminus } from '@godaddy/terminus';
+import { getLogger } from '../utils/logger';
 
 export const setUpHealthEndpoint = <T>(server: T) => {
   const onSignal = () => {
-    console.log('Server is starting clean-up');
+    getLogger('backend-main').info('Server is starting clean-up');
     return Promise.all([
       new Promise((resolve) => {
         if (mongoose.connection && mongoose.connection.readyState == 1) {