build: optimize the Dockerfile

Dockerfile

@@ -24,12 +24,6 @@ ENV	ANDROID_APIS="android-26" \
 ### Set $PATH
 ENV PATH=$ANDROID_HOME/tools:$ANDROID_HOME/tools/bin:$ANDROID_HOME/platform-tools:$ANDROID_HOME/build-tools/$ANDROID_BUILD_TOOLS_VERSION:$PATH
 
-### Set working directory
-WORKDIR /app
-
-### Add contents to working directory
-ADD . /app
-
 ### Replace shell with bash
 RUN	rm /bin/sh && ln -s /bin/bash /bin/sh && \
   ### Set debconf to run non-interactively
@@ -84,15 +78,6 @@ RUN apt-get update -y && \
 RUN rm /etc/ssl/certs/java/cacerts && \
   update-ca-certificates -f
 
-### Copy scripts directory into the tmp folder, so it's available to the following commands
-COPY $SCRIPTS_DIRECTORY/$NODE_SETUP_SCRIPT /tmp/
-
-RUN	bash /tmp/$NODE_SETUP_SCRIPT && apt-get install -y nodejs && \
-  ### Update npm to latest version
-  npm install -g npm@$NPM_VERSION && \
-  ### Install needed npm packages
-  npm install -g @ionic/cli@$IONIC_VERSION cordova@$CORDOVA_VERSION
-
 ### Install android
 RUN	curl $ANDROID_SDK_TOOLS_DOWNLOAD_URL > /tmp/android-sdk.zip && \
   unzip /tmp/android-sdk.zip && \
@@ -103,6 +88,21 @@ RUN	curl $ANDROID_SDK_TOOLS_DOWNLOAD_URL > /tmp/android-sdk.zip && \
   ### Install platform tools
   sdkmanager "platforms;$ANDROID_APIS" "build-tools;$ANDROID_BUILD_TOOLS_VERSION"
 
+### Set working directory
+WORKDIR /app
+
+### Add contents to working directory
+ADD . /app
+
+### Copy scripts directory into the tmp folder, so it's available to the following commands
+COPY $SCRIPTS_DIRECTORY/$NODE_SETUP_SCRIPT /tmp/
+
+RUN	bash /tmp/$NODE_SETUP_SCRIPT && apt-get install -y nodejs && \
+  ### Update npm to latest version
+  npm install -g npm@$NPM_VERSION && \
+  ### Install needed npm packages
+  npm install -g @ionic/cli@$IONIC_VERSION cordova@$CORDOVA_VERSION
+
 ### Create, build, delete an empty cordova project to download necessary maven files and keep them in image
 RUN	cordova create tmp-project && \
   cd tmp-project && \