Update the dependencies of Dapr sample apps

Signed-off-by: ytimocin <[email protected]>

.gitignore

@@ -348,3 +348,6 @@ MigrationBackup/
 
 # Ionide (cross platform F# VS Code tools) working folder
 .ionide/
+
+# DS_Store files
+**/.DS_Store

samples/dapr/nodeapp/Dockerfile

@@ -1,6 +1,19 @@
-FROM node:8-alpine
+FROM node:20-alpine
+
+# Set the working directory
 WORKDIR /app
-COPY . .
+
+# Copy package.json and package-lock.json first to leverage Docker cache
+COPY package*.json ./
+
+# Install dependencies
 RUN npm install
+
+# Copy the rest of the application code
+COPY . .
+
+# Expose the application port
 EXPOSE 3000
-CMD [ "node", "app.js" ]
+
+# Define the command to run the application
+CMD ["node", "app.js"]