Update 'Dockerfile'

Dockerfile

@@ -1,10 +1,10 @@
-#FROM mcr.microsoft.com/powershell:alpine-3.8
 FROM mcr.microsoft.com/powershell:ubuntu-bionic
 
 COPY init/entrypoint.sh /usr/local/bin
 
 RUN chmod +x /usr/local/bin/entrypoint.sh && \
-    apk install --update --no-cache \
+    apt update && \
+    apt install \
       lighttpd \
       fcgi \
       php7-cgi \
@@ -28,7 +28,7 @@ RUN chmod +x /usr/local/bin/entrypoint.sh && \
 #      php7-soap \
 #      php7-xml \
       php7-xmlrpc && \
-#    rm -rf /var/cache/apk/* && \
+    rm -rf /var/lib/apt/lists/* && \
     # Enable PHP
     sed -i 's:#   include "mod_fastcgi.conf":   include "mod_fastcgi.conf":' /etc/lighttpd/lighttpd.conf && \
     sed -i 's:/usr/bin/php-cgi:/usr/bin/php-cgi7:' /etc/lighttpd/mod_fastcgi.conf && \