adding alping dockersz

alpine_dockerz/Dockerfile

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+FROM alpine:latest
+
+ARG USER
+ARG USER_PASSWORD
+
+RUN apk update && apk upgrade && apk add alpine-sdk wget cmake coreutils bash openssh tmux git curl nmap john nano gcc python3 python 
+RUN adduser -G abuild -g "Alpine Package Builder" -s /bin/ash -D $USER 
+RUN echo "${USER} ALL=(ALL) NOPASSWD:ALL" >> /etc/sudoers \
+  && mkdir /packages \
+  && chown $USER:abuild /packages \
+  && mkdir -p /var/cache/apk \
+  && ln -s /var/cache/apk /etc/apk/cache
+RUN apk add binwalk --repository http://dl-cdn.alpinelinux.org/alpine/edge/testing
+RUN echo "${USER}:${USER_PASSWORD}" | chpasswd
+RUN rm -rf /etc/ssh/ssh_host_rsa_key /etc/ssh/ssh_host_dsa_key
+RUN ssh-keygen -f /etc/ssh/ssh_host_rsa_key -N '' -t rsa
+RUN ssh-keygen -f /etc/ssh/ssh_host_dsa_key -N '' -t dsa
+RUN mkdir -p /var/run/sshd
+
+ADD motd /etc/motd
+EXPOSE 22
+CMD ["/usr/sbin/sshd", "-D"]

alpine_dockerz/docker-compose.yml

@@ -0,0 +1,32 @@
+---
+version: "3"
+services:
+  alice:
+    build: 
+      context: .
+      dockerfile: Dockerfile
+      args:
+        - "USER=alice"
+        - "USER_PASSWORD=<CHANGEME>"
+    ports:
+      - "9001:22"
+
+  bob:
+    build: 
+      context: .
+      dockerfile: Dockerfile
+      args:
+        - "USER=bob"
+        - "USER_PASSWORD=<CHANGEME>"
+    ports:
+      - "9002:22"
+
+  chris:
+    build: 
+      context: .
+      dockerfile: Dockerfile
+      args:
+        - "USER=chris"
+        - "USER_PASSWORD=<CHANGEME>"
+    ports:
+      - "9003:22"