chore(backend): Loki configureren

De meeste console statements vervangen door Loki

backend/src/logging/initalize.ts

@@ -0,0 +1,47 @@
+import { createLogger, format, Logger, transports } from 'winston';
+import LokiTransport from 'winston-loki';
+import { LokiLabels } from 'loki-logger-ts';
+
+const LoggingLevel = 'development' === process.env.NODE_ENV ? 'debug' : 'info';
+const Host = 'http://localhost:3102';
+const Labels: LokiLabels = {
+    source: 'Dwengo-Backend',
+    job: 'Dwengo-Backend',
+    host: 'localhost',
+};
+
+let logger: Logger;
+
+function initializeLogger() {
+    if (logger !== undefined) {
+        return logger;
+    }
+
+    const lokiTransport: LokiTransport = new LokiTransport({
+        host: Host,
+        labels: Labels,
+        level: LoggingLevel,
+        json: true,
+        format: format.combine(format.timestamp(), format.json()),
+        onConnectionError: (err) => {
+            console.error(`Connection error: ${err}`);
+        },
+    });
+
+    const consoleTransport = new transports.Console({
+        level: LoggingLevel,
+        format: format.combine(format.simple(), format.colorize()),
+    });
+
+    logger = createLogger({
+        transports: [lokiTransport, consoleTransport],
+    });
+
+    logger.debug('Logger initialized');
+    return logger;
+}
+
+export function getLogger(): Logger {
+    logger ||= initializeLogger();
+    return logger;
+}

backend/src/logging/responseTimeLogger.ts

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+import { getLogger } from './initalize.js';
+import { Logger } from 'winston';
+import { Request, Response } from 'express';
+
+export function responseTimeLogger(req: Request, res: Response, time: number) {
+    const logger: Logger = getLogger();
+
+    const method = req.method;
+    const url = req.url;
+    const status = res.statusCode;
+
+    logger.info({
+        message: 'Request completed',
+        method: method,
+        url: url,
+        status: status,
+        responseTime: Number(time),
+        labels: {
+            origin: 'api',
+            type: 'responseTime',
+        },
+    });
+}