diff --git a/.last_dir b/.last_dir
index 7b4dcb5..e082170 100644
--- a/.last_dir
+++ b/.last_dir
@@ -1 +1 @@
-js
+ts
diff --git a/Dockerfile b/Dockerfile
index 28892ec..a9e4746 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -4,13 +4,6 @@ WORKDIR /app
 
 COPY ./ .
 
-ARG BUILD_ENV
-
-RUN echo building $BUILD_ENV
-
 RUN npm install
-
-RUN BUILD_ENV=$BUILD_ENV npm run build
-
 CMD ["npm", "start"]
 
diff --git a/js/Dockerfile b/js/Dockerfile
index a9e4746..28892ec 100644
--- a/js/Dockerfile
+++ b/js/Dockerfile
@@ -4,6 +4,13 @@ WORKDIR /app
 
 COPY ./ .
 
+ARG BUILD_ENV
+
+RUN echo building $BUILD_ENV
+
 RUN npm install
+
+RUN BUILD_ENV=$BUILD_ENV npm run build
+
 CMD ["npm", "start"]
 
diff --git a/js/package.json b/js/package.json
index dba9bb0..7fb76d2 100644
--- a/js/package.json
+++ b/js/package.json
@@ -1,8 +1,8 @@
 {
   "name": "sample-js-project",
-  "version": "1.0.0-pre.2",
+  "version": "1.6.0-pre.4",
   "scripts": {
-    "build": "echo 'Building JS project...'"
+    "build": "echo 'Building JS project...' && echo $BUILD_ENV"
   },
   "dependencies": {}
 }
diff --git a/package.json b/package.json
index 7fb76d2..638379b 100644
--- a/package.json
+++ b/package.json
@@ -1,8 +1,12 @@
 {
-  "name": "sample-js-project",
-  "version": "1.6.0-pre.4",
+  "name": "sample-ts-project",
+  "version": "1.0.0",
   "scripts": {
-    "build": "echo 'Building JS project...' && echo $BUILD_ENV"
+    "build": "tsc"
   },
-  "dependencies": {}
+  "dependencies": {},
+  "devDependencies": {
+    "typescript": "^4.5.2"
+  }
 }
+
diff --git a/sample.ts b/sample.ts
new file mode 100644
index 0000000..ccc4592
--- /dev/null
+++ b/sample.ts
@@ -0,0 +1,2 @@
+console.log("Hello from TypeScript");
+
diff --git a/tsconfig.json b/tsconfig.json
new file mode 100644
index 0000000..bcc1941
--- /dev/null
+++ b/tsconfig.json
@@ -0,0 +1,8 @@
+{
+  "compilerOptions": {
+    "target": "es5",
+    "module": "commonjs"
+  },
+  "include": ["*.ts"]
+}
+