add log to file

mmh · mmh · commit 3129d7dd1071 · 2021-10-08T14:22:04.000+02:00
diff --git a/Dockerfile b/Dockerfile
@@ -20,6 +20,8 @@ RUN set -ex \
 FROM node:14-alpine AS final
 WORKDIR /app
 COPY --from=build /app /app
+RUN mkdir /app/logs
+RUN chown 1000 /app/logs
 ENV HTTP_PORT=8080 HTTPS_PORT=8443
 EXPOSE $HTTP_PORT $HTTPS_PORT
 USER 1000
diff --git a/index.js b/index.js
@@ -9,6 +9,17 @@ var concat = require('concat-stream');
 const { promisify } = require('util');
 const sleep = promisify(setTimeout);
 
+var fs = require('fs');
+var util = require('util');
+var log_file = fs.createWriteStream(__dirname + '/logs/debug.log', {flags : 'w'});
+var log_stdout = process.stdout;
+
+// write to a logfile besides the console
+console.log = function(d) { //
+  log_file.write(util.format(d) + '\n');
+  log_stdout.write(util.format(d) + '\n');
+};
+
 app.set('json spaces', 2);
 app.set('trust proxy', ['loopback', 'linklocal', 'uniquelocal']);
 
