seperate build base

Dockerfile.alpine

@@ -9,16 +9,17 @@ RUN apk add --quiet --no-cache \
     apache2 \
     wget \
     curl \
-    build-base \
-    autoconf \
-    libpng-dev \
-    libjpeg-turbo-dev \
-    libwebp-dev \
-    freetype-dev \
-    libxml2-dev \
-    mariadb-connector-c-dev \
-    postgresql-dev \
-    sqlite-dev \
+    && apk add --quiet --no-cache --virtual .build-deps \
+        build-base \
+        autoconf \
+        libpng-dev \
+        libjpeg-turbo-dev \
+        libwebp-dev \
+        freetype-dev \
+        libxml2-dev \
+        mariadb-connector-c-dev \
+        postgresql-dev \
+        sqlite-dev \
     && install-php-extensions iconv gd pdo pdo_mysql pdo_pgsql pdo_sqlite pgsql zip \
     && apk del .build-deps