Fix apk add argument "--update" to "--update-cache"

README.md

@@ -70,15 +70,15 @@ ADD https://dl.bintray.com/php-alpine/key/php-alpine.rsa.pub /etc/apk/keys/php-a
 ## you may join the multiple run lines here to make it a single layer
 
 # make sure you can use HTTPS
-RUN apk --update add ca-certificates
+RUN apk --update-cache add ca-certificates
 
 # add the repository, make sure you replace the correct versions if you want.
 RUN echo "https://dl.bintray.com/php-alpine/v3.9/php-7.3" >> /etc/apk/repositories
 
 # install php and some extensions
-RUN apk add --update php
-RUN apk add --update php-mbstring
-RUN apk add --update php-you-extension-name-here
+RUN apk add --update-cache php
+RUN apk add --update-cache php-mbstring
+RUN apk add --update-cache php-you-extension-name-here
 ```
 
 ### Bash / Shell scripting
@@ -90,7 +90,7 @@ RUN apk add --update php-you-extension-name-here
 #!/usr/bin/env sh
 
 # install curl and certificates to download the key
-apk add --update curl ca-certificates
+apk add --update-cache curl ca-certificates
 
 # download the repository public key
 curl https://dl.bintray.com/php-alpine/key/php-alpine.rsa.pub -o /etc/apk/keys/php-alpine.rsa.pub
@@ -99,9 +99,9 @@ curl https://dl.bintray.com/php-alpine/key/php-alpine.rsa.pub -o /etc/apk/keys/p
 echo "https://dl.bintray.com/php-alpine/v3.9/php-7.3" >> /etc/apk/repositories
 
 # install packages
-apk add --update php
-apk add --update php-redis
-apk add --update php-any-other-extension
+apk add --update-cache php
+apk add --update-cache php-redis
+apk add --update-cache php-any-other-extension
 
 ```
 

images/Dockerfile

@@ -15,22 +15,22 @@ ARG ALPINE_VERSION
 ARG PHP_VERSION
 
 # ADD SDK AND BASIC TOOLS.
-RUN apk add --update alpine-sdk sudo git bash nano
+RUN apk add --update-cache alpine-sdk sudo git bash nano
 
 # trust this project public key to trust the packages.
 ADD https://dl.bintray.com/php-alpine/key/php-alpine.rsa.pub /etc/apk/keys/php-alpine.rsa.pub
 
 # make sure you can use HTTPS
-RUN apk --update add ca-certificates
+RUN apk --update-cache add ca-certificates
 
 # CONFIGURE ALPINE REPOSITORIES AND PHP BUILD DIR.
 RUN echo "http://dl-cdn.alpinelinux.org/alpine/v${ALPINE_VERSION}/main" > /etc/apk/repositories && \
     echo "http://dl-cdn.alpinelinux.org/alpine/v${ALPINE_VERSION}/community" >> /etc/apk/repositories && \
     echo "https://dl.bintray.com/php-alpine/v${ALPINE_VERSION}/php-${PHP_VERSION}" >> /etc/apk/repositories
 
-RUN apk add --update \
+RUN apk add --update-cache \
     php \
     php-mbstring
 
 # START WITH BASH.
-CMD ["/bin/bash"]
\ No newline at end of file
+CMD ["/bin/bash"]

sandbox/Dockerfile

@@ -17,7 +17,7 @@ ARG APK_PACKAGER
 ARG APK_MAINTAINER
 
 # ADD SDK AND BASIC TOOLS.
-RUN apk add --update alpine-sdk sudo git bash nano
+RUN apk add --update-cache alpine-sdk sudo git bash nano
 
 # CONFIGURE ALPINE REPOSITORIES AND PHP BUILD DIR.
 RUN echo "http://dl-cdn.alpinelinux.org/alpine/v${ALPINE_VERSION}/main" > /etc/apk/repositories && \
@@ -65,4 +65,4 @@ ENTRYPOINT ["/bin/start.sh"]
 WORKDIR "/home/sandbox/php-${PHP_VERSION}"
 
 # START WITH BASH.
-CMD ["/bin/bash"]
\ No newline at end of file
+CMD ["/bin/bash"]