build: ensure we purge apt cache after install

Author: iBotPeaches

examples/laravel/Dockerfile

@@ -19,7 +19,10 @@ RUN apt-get update && apt-get install --no-install-recommends -y \
     libmagickwand-dev \
     libghc-postgresql-libpq-dev \
     libbz2-dev \
-    libfontconfig && rm -rf /var/lib/apt/lists/*
+    libfontconfig \
+    && apt-get -y autoremove \
+    && apt-get clean \
+    && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
 
 # PHP Extensions needed for Laravel
 RUN docker-php-ext-install calendar zip intl pdo_mysql bcmath opcache pdo

examples/yii2/Dockerfile

@@ -16,7 +16,10 @@ RUN apt-get update && apt-get install --no-install-recommends -y \
     libmagickwand-dev \
     libghc-postgresql-libpq-dev \
     libbz2-dev \
-    libfontconfig && rm -rf /var/lib/apt/lists/*
+    libfontconfig \
+    && apt-get -y autoremove \
+    && apt-get clean \
+    && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
 
 # PHP Extensions needed for yii2
 RUN docker-php-ext-install calendar zip mcrypt intl mbstring pdo_mysql bcmath opcache pdo pdo_pgsql