feat: add logger

- use log4js for logger

.gitignore

@@ -27,4 +27,8 @@ models/mongodb/FHIRDataTypesSchema-New
 config/config.js
 
 #ignore apidoc comment files
-docs/apidoc/apidoc-sources
+docs/apidoc/apidoc-sources
+
+#ignore log files
+/log
+/pm2log

config/log4js.json

@@ -0,0 +1,38 @@
+{
+    "appenders": {
+        "burni-info": {
+            "type": "file",
+            "filename": "log/burni-info.log",
+            "maxLogSize": 10485760,
+            "numBackups": 3
+        },
+        "burni-error": {
+            "type": "file",
+            "filename": "log/errors.log"
+        },
+        "errors": {
+            "type": "logLevelFilter",
+            "level": "ERROR",
+            "appender": "burni-error"
+        },
+        "infos": {
+            "type": "logLevelFilter",
+            "level": "INFO",
+            "maxLevel": "INFO",
+            "appender": "burni-info"
+        },
+        "console": {
+            "type": "console"
+        }
+    },
+    "categories": {
+        "default": {
+            "appenders": [
+                "infos",
+                "errors",
+                "console"
+            ],
+            "level": "DEBUG"
+        }
+    }
+}

package.json

@@ -36,6 +36,7 @@
         "js-beautify": "^1.13.0",
         "jsonwebtoken": "^8.5.1",
         "lodash": "^4.17.21",
+        "log4js": "^6.4.1",
         "mkdirp": "^1.0.4",
         "moment": "^2.24.0",
         "moment-timezone": "^0.5.33",

utils/log.js

@@ -0,0 +1,6 @@
+const path = require('path');
+const { configure, getLogger } = require('log4js');
+configure(path.join(__dirname, "../config/log4js.json"));
+let burniLog = getLogger("burni");
+
+module.exports.logger = burniLog;