fix: Dockerfile with flutter & dart as well

Dockerfile

@@ -4,14 +4,26 @@ LABEL "com.github.actions.description"="Automating version bump for conventional
 LABEL "com.github.actions.icon"="upload-cloud"
 LABEL "com.github.actions.color"="blue"
 
+# Install system dependencies for Git, Curl, and Unzip
+RUN apt-get update && apt-get install -y git curl unzip xz-utils
+
 # Copy the package.json and package-lock.json
 COPY package*.json ./
-RUN npm install -g npm@latest
 RUN npm install
 
-# Install dependencies
-RUN apt-get update
-RUN apt-get -y install git
+# Install Dart and Flutter
+# Set the Flutter version you want to use
+ENV FLUTTER_VERSION=stable
+RUN git clone --branch $FLUTTER_VERSION https://github.com/flutter/flutter.git /usr/local/flutter
+
+# Add Flutter to PATH
+ENV PATH="/usr/local/flutter/bin:/usr/local/flutter/bin/cache/dart-sdk/bin:${PATH}"
+
+# Pre-download development binaries and libraries
+RUN flutter precache
+
+# Run basic check to download Dark SDK
+RUN flutter doctor
 
 # Copy the rest of your action's code
 COPY . .