Apply COPY vs ADD best practices

Should only use `ADD` for URLs (and even then, `curl` or `wget` are preferred, for numerous reasons, even within this repo) and when extracting archive contents as part of the `ADD` operation; otherwise `COPY` is clearer and (slightly) more efficient.

aerospike/Dockerfile

@@ -4,4 +4,4 @@ LABEL maintainer="Luciano Jr <[email protected]>"
 
 RUN rm /etc/aerospike/aerospike.conf
 
-ADD aerospike.conf /etc/aerospike/aerospike.conf
+COPY aerospike.conf /etc/aerospike/aerospike.conf

hhvm/Dockerfile

@@ -15,7 +15,7 @@ RUN apt-get update -y \
 
 RUN mkdir -p /var/www
 
-ADD server.ini /etc/hhvm/server.ini
+COPY server.ini /etc/hhvm/server.ini
 
 RUN usermod -u 1000 www-data
 

mariadb/Dockerfile

@@ -2,7 +2,7 @@ FROM mariadb:latest
 
 LABEL maintainer="Mahmoud Zalt <[email protected]>"
 
-ADD my.cnf /etc/mysql/conf.d/my.cnf
+COPY my.cnf /etc/mysql/conf.d/my.cnf
 
 CMD ["mysqld"]
 

mysql/Dockerfile

@@ -13,7 +13,7 @@ RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone
 
 RUN chown -R mysql:root /var/lib/mysql/
 
-ADD my.cnf /etc/mysql/conf.d/my.cnf
+COPY my.cnf /etc/mysql/conf.d/my.cnf
 
 CMD ["mysqld"]
 

nginx/Dockerfile

@@ -2,7 +2,7 @@ FROM nginx:alpine
 
 LABEL maintainer="Mahmoud Zalt <[email protected]>"
 
-ADD nginx.conf /etc/nginx/
+COPY nginx.conf /etc/nginx/
 
 # If you're in China, or you need to change sources, will be set CHANGE_SOURCE to true in .env.
 

percona/Dockerfile

@@ -4,7 +4,7 @@ LABEL maintainer="DTUNES <[email protected]>"
 
 RUN chown -R mysql:root /var/lib/mysql/
 
-ADD my.cnf /etc/mysql/conf.d/my.cnf
+COPY my.cnf /etc/mysql/conf.d/my.cnf
 
 CMD ["mysqld"]
 

php-fpm/Dockerfile-56

@@ -358,8 +358,8 @@ RUN php -v | head -n 1 | grep -q "PHP 5.6."
 #--------------------------------------------------------------------------
 #
 
-ADD ./laravel.ini /usr/local/etc/php/conf.d
-ADD ./xlaravel.pool.conf /usr/local/etc/php-fpm.d/
+COPY ./laravel.ini /usr/local/etc/php/conf.d
+COPY ./xlaravel.pool.conf /usr/local/etc/php-fpm.d/
 
 #RUN rm -r /var/lib/apt/lists/*
 

php-fpm/Dockerfile-70

@@ -380,8 +380,8 @@ RUN php -v | head -n 1 | grep -q "PHP 7.0."
 #--------------------------------------------------------------------------
 #
 
-ADD ./laravel.ini /usr/local/etc/php/conf.d/
-ADD ./xlaravel.pool.conf /usr/local/etc/php-fpm.d/
+COPY ./laravel.ini /usr/local/etc/php/conf.d/
+COPY ./xlaravel.pool.conf /usr/local/etc/php-fpm.d/
 
 #RUN rm -r /var/lib/apt/lists/*
 

php-fpm/Dockerfile-71

@@ -380,8 +380,8 @@ RUN php -v | head -n 1 | grep -q "PHP 7.1."
 #--------------------------------------------------------------------------
 #
 
-ADD ./laravel.ini /usr/local/etc/php/conf.d
-ADD ./xlaravel.pool.conf /usr/local/etc/php-fpm.d/
+COPY ./laravel.ini /usr/local/etc/php/conf.d
+COPY ./xlaravel.pool.conf /usr/local/etc/php-fpm.d/
 
 #RUN rm -r /var/lib/apt/lists/*
 

php-fpm/Dockerfile-72

@@ -383,8 +383,8 @@ RUN php -v | head -n 1 | grep -q "PHP 7.2."
 #--------------------------------------------------------------------------
 #
 
-ADD ./laravel.ini /usr/local/etc/php/conf.d
-ADD ./xlaravel.pool.conf /usr/local/etc/php-fpm.d/
+COPY ./laravel.ini /usr/local/etc/php/conf.d
+COPY ./xlaravel.pool.conf /usr/local/etc/php-fpm.d/
 
 #RUN rm -r /var/lib/apt/lists/*
 

varnish/Dockerfile

@@ -19,8 +19,8 @@ ENV VARNISH_PORT    6081
 ENV BACKEND_HOST    localhost
 ENV BACKEND_PORT    80
 
-ADD default.vcl /etc/varnish/default.vcl
-ADD start.sh /etc/varnish/start.sh
+COPY default.vcl /etc/varnish/default.vcl
+COPY start.sh /etc/varnish/start.sh
 
 RUN chmod +x /etc/varnish/start.sh
 

workspace/Dockerfile-56

@@ -209,8 +209,8 @@ RUN if [ ${INSTALL_XDEBUG} = false -a ${INSTALL_BLACKFIRE} = true ]; then \
 ARG INSTALL_WORKSPACE_SSH=false
 ENV INSTALL_WORKSPACE_SSH ${INSTALL_WORKSPACE_SSH}
 
-ADD insecure_id_rsa /tmp/id_rsa
-ADD insecure_id_rsa.pub /tmp/id_rsa.pub
+COPY insecure_id_rsa /tmp/id_rsa
+COPY insecure_id_rsa.pub /tmp/id_rsa.pub
 
 RUN if [ ${INSTALL_WORKSPACE_SSH} = true ]; then \
     rm -f /etc/service/sshd/down && \

workspace/Dockerfile-70

@@ -206,8 +206,8 @@ RUN if [ ${INSTALL_XDEBUG} = false -a ${INSTALL_BLACKFIRE} = true ]; then \
 ARG INSTALL_WORKSPACE_SSH=false
 ENV INSTALL_WORKSPACE_SSH ${INSTALL_WORKSPACE_SSH}
 
-ADD insecure_id_rsa /tmp/id_rsa
-ADD insecure_id_rsa.pub /tmp/id_rsa.pub
+COPY insecure_id_rsa /tmp/id_rsa
+COPY insecure_id_rsa.pub /tmp/id_rsa.pub
 
 RUN if [ ${INSTALL_WORKSPACE_SSH} = true ]; then \
     rm -f /etc/service/sshd/down && \

workspace/Dockerfile-71

@@ -202,8 +202,8 @@ RUN if [ ${INSTALL_XDEBUG} = false -a ${INSTALL_BLACKFIRE} = true ]; then \
 ARG INSTALL_WORKSPACE_SSH=false
 ENV INSTALL_WORKSPACE_SSH ${INSTALL_WORKSPACE_SSH}
 
-ADD insecure_id_rsa /tmp/id_rsa
-ADD insecure_id_rsa.pub /tmp/id_rsa.pub
+COPY insecure_id_rsa /tmp/id_rsa
+COPY insecure_id_rsa.pub /tmp/id_rsa.pub
 
 RUN if [ ${INSTALL_WORKSPACE_SSH} = true ]; then \
     rm -f /etc/service/sshd/down && \

workspace/Dockerfile-72

@@ -203,8 +203,8 @@ RUN if [ ${INSTALL_XDEBUG} = false -a ${INSTALL_BLACKFIRE} = true ]; then \
 ARG INSTALL_WORKSPACE_SSH=false
 ENV INSTALL_WORKSPACE_SSH ${INSTALL_WORKSPACE_SSH}
 
-ADD insecure_id_rsa /tmp/id_rsa
-ADD insecure_id_rsa.pub /tmp/id_rsa.pub
+COPY insecure_id_rsa /tmp/id_rsa
+COPY insecure_id_rsa.pub /tmp/id_rsa.pub
 
 RUN if [ ${INSTALL_WORKSPACE_SSH} = true ]; then \
     rm -f /etc/service/sshd/down && \