diff --git a/.DS_Store b/.DS_Store
deleted file mode 100644
index cb609b2..0000000
Binary files a/.DS_Store and /dev/null differ
diff --git a/client/.gitignore b/.gitignore
similarity index 88%
rename from client/.gitignore
rename to .gitignore
index 4d29575..32841ab 100644
--- a/client/.gitignore
+++ b/.gitignore
@@ -1,15 +1,15 @@
 # See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
 
 # dependencies
-/node_modules
-/.pnp
+*/node_modules
+*/.pnp
 .pnp.js
 
 # testing
 /coverage
 
 # production
-/build
+*/build
 
 # misc
 .DS_Store
@@ -21,3 +21,5 @@
 npm-debug.log*
 yarn-debug.log*
 yarn-error.log*
+
+*.env
\ No newline at end of file
diff --git a/client/package-lock.json b/client/package-lock.json
index 02143f2..93bdf64 100644
--- a/client/package-lock.json
+++ b/client/package-lock.json
@@ -13,7 +13,6 @@
         "@testing-library/user-event": "^13.5.0",
         "add-to-calendar-button-react": "^2.4.3",
         "bootstrap": "^5.3.2",
-        "esm": "^3.2.25",
         "react": "^18.2.0",
         "react-dom": "^18.2.0",
         "react-scripts": "^5.0.1",
@@ -7725,14 +7724,6 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
-    "node_modules/esm": {
-      "version": "3.2.25",
-      "resolved": "https://registry.npmjs.org/esm/-/esm-3.2.25.tgz",
-      "integrity": "sha512-U1suiZ2oDVWv4zPO56S0NcR5QriEahGtdN2OR6FiOG4WJvcjBVFB0qI4+eKoWFH483PKGuLuu6V8Z4T5g63UVA==",
-      "engines": {
-        "node": ">=6"
-      }
-    },
     "node_modules/espree": {
       "version": "9.6.1",
       "resolved": "https://registry.npmjs.org/espree/-/espree-9.6.1.tgz",
@@ -16302,16 +16293,16 @@
       }
     },
     "node_modules/typescript": {
-      "version": "5.2.2",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.2.2.tgz",
-      "integrity": "sha512-mI4WrpHsbCIcwT9cF4FZvr80QUeKvsUsUvKDoR+X/7XHQH98xYD8YHZg7ANtz2GtZt/CBq2QJ0thkGJMHfqc1w==",
+      "version": "4.9.5",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-4.9.5.tgz",
+      "integrity": "sha512-1FXk9E2Hm+QzZQ7z+McJiHL4NW1F2EzMu9Nq9i3zAaGqibafqYwCVU6WyWAuyQRRzOlxou8xZSyXLEN8oKj24g==",
       "peer": true,
       "bin": {
         "tsc": "bin/tsc",
         "tsserver": "bin/tsserver"
       },
       "engines": {
-        "node": ">=14.17"
+        "node": ">=4.2.0"
       }
     },
     "node_modules/unbox-primitive": {
diff --git a/client/package.json b/client/package.json
index 2d1b494..ae2fc1c 100644
--- a/client/package.json
+++ b/client/package.json
@@ -9,7 +9,6 @@
     "@testing-library/user-event": "^13.5.0",
     "add-to-calendar-button-react": "^2.4.3",
     "bootstrap": "^5.3.2",
-    "esm": "^3.2.25",
     "react": "^18.2.0",
     "react-dom": "^18.2.0",
     "react-scripts": "^5.0.1",
diff --git a/server/.DS_Store b/server/.DS_Store
deleted file mode 100644
index 32fc70c..0000000
Binary files a/server/.DS_Store and /dev/null differ
diff --git a/server/.gitignore b/server/.gitignore
deleted file mode 100644
index 7af7f04..0000000
--- a/server/.gitignore
+++ /dev/null
@@ -1,2 +0,0 @@
-/node_modules
-.env
\ No newline at end of file
diff --git a/server/features/addcheckinLinks.js b/server/features/addcheckinLinks.js
index a309788..85f8440 100644
--- a/server/features/addcheckinLinks.js
+++ b/server/features/addcheckinLinks.js
@@ -11,7 +11,7 @@
  */
 
 function insertCheckInLink(cal) {
-    console.log("test")
+    //console.log("test")
 
     /*
     const eventDescriptionPattern = /(DESCRIPTION:Event type:.*?\\n)(Location:.*?\\n)/gs;
@@ -26,7 +26,7 @@ function insertCheckInLink(cal) {
     if (cal.match(descriptionPattern)) {
       //return cal.replace(eventDescriptionPattern, `$1\n${checkInLink}$2`);
       cal = cal.replace(descriptionPattern, `${checkInLink}`);
-      console.log(cal);
+      //console.log(cal);
     } else {
       console.warn("No event description match found!");
     }
diff --git a/server/index.js b/server/index.js
index 93d4173..25e1e59 100644
--- a/server/index.js
+++ b/server/index.js
@@ -37,17 +37,12 @@ function performModifications(cal, stepsString) {
       case "01": // replace course code with course code and course name
         cal = replaceTitle.replaceCourseCodesWithCodeAndNames(cal, courses);
         break;
-      case "02": // add a checkin link in description
-        cal = addcheckinLinks.insertCheckInLink(cal);
-        break;
-      case "03": // force restyling of calender every 24 hours
+      case "02": // force restyling of calender every 24 hours
         cal = syncForcedBreakpoint.run(cal);
         break;
-      // Add a new feature here.
-      // I just submit first. Actually I am not sure if this featured is better used directly with other features or seperated with other features
-      //case "03": // add a checkin link in description
-      //  cal = addcheckinLinks.insertCheckInLink(cal);
-      //  break;
+      case "03": // add a checkin link in description
+        cal = addcheckinLinks.insertCheckInLink(cal);
+        break;
       default:
         console.log("step "+ step + " called but not defined in performModifications switch")
     }