try to build nginx from alpine

srcs/requirements/nginx/Dockerfile

@@ -1,11 +1,20 @@
-#FROM alpine:3.15
-FROM debian:buster
+# alpine :
+FROM alpine:3.15
+# debian :
+#FROM debian:buster
 
-RUN apt update && apt install -y nginx openssl
+# alpine :
+RUN apk add nginx openssl
+# debian :
+#RUN apt update && apt install -y nginx openssl && rm -rf /var/lib/apt/lists/*
 
 # for debug
 #RUN apt install -y procps vim
 
+# alpine :
+RUN mkdir -p /etc/ssl/private
+RUN mkdir -p /etc/ssl/certs
+
 # create ssl certificate
 RUN openssl req -newkey rsa:2048 -nodes -x509 \
 	-keyout /etc/ssl/private/hulamy.42.fr.key -out /etc/ssl/certs/hulamy.42.fr.crt \
@@ -22,6 +31,9 @@ COPY ./conf/https/index.html /data/wwws/
 CMD [ "nginx", "-g", "daemon off;" ]
 
 
+#
+# run nginx with alpine :
+#   https://www.techtarget.com/searchitoperations/tutorial/Use-Docker-and-Alpine-Linux-to-build-lightweight-containers
 #
 # -g 'daemon off' :
 #   daemon off, to avoid the main process of nginx to quit after creating its childs, and therefore make docker exit