Update alpine version

pkg/adlin-tuto1/Dockerfile

@@ -1,4 +1,4 @@
-FROM alpine:edge AS mirror
+FROM alpine:3.15 AS mirror
 
 RUN mkdir -p /out/etc/apk/ && \
     cp /etc/apk/repositories /out/etc/apk/ && \

pkg/arp-spoofer/Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:alpine as gobuild
+FROM golang:1.17-alpine3.15 as gobuild
 
 RUN apk add --no-cache git
 
@@ -6,11 +6,10 @@ WORKDIR /go/src/arp-spoofer
 
 ADD cmd ./
 
-RUN go get -d -v
-RUN go build -v
+RUN go build -v -ldflags="-s -w" -o arp-spoofer
 
 
-FROM alpine
+FROM alpine:3.15
 MAINTAINER Pierre-Olivier Mercier <nemunaire@nemunai.re>
 
 COPY --from=gobuild /go/src/arp-spoofer/arp-spoofer /bin/arp-spoofer

pkg/awx_web/Dockerfile

@@ -1,4 +1,4 @@
-FROM alpine
+FROM alpine:3.15
 
 RUN apk add --no-cache \
     git

pkg/challenge/Dockerfile

@@ -1,4 +1,4 @@
-FROM alpine AS mirror
+FROM alpine:3.15 AS mirror
 
 RUN mkdir -p /out/etc/apk/ && \
     cp /etc/apk/repositories /out/etc/apk/ && \
@@ -7,7 +7,7 @@ RUN mkdir -p /out/etc/apk/ && \
 RUN apk add --no-cache \
     gcc \
     linux-headers \
-    mdocml-apropos \
+    mandoc-apropos \
     musl-dev
 
 RUN apk add --no-cache --initdb -p /out \
@@ -33,7 +33,7 @@ RUN apk add --no-cache --initdb -p /out \
     kbd-bkeymaps \
     kbd-doc \
     kbd-vlock \
-    man \
+    mandoc \
     man-pages \
     musl \
     nano \

pkg/debug/Dockerfile

@@ -1,4 +1,4 @@
-FROM alpine AS mirror
+FROM alpine:3.15 AS mirror
 
 RUN mkdir -p /out/etc/apk/ && \
     cp /etc/apk/repositories /out/etc/apk/ && \

pkg/login-validator/Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:alpine as gobuild
+FROM golang:1.17-alpine3.15 as gobuild
 
 RUN apk add --no-cache git
 
@@ -9,7 +9,7 @@ ADD cmd ./
 RUN go build -v -ldflags="-s -w" -o login-validator
 
 
-FROM alpine
+FROM alpine:3.15
 MAINTAINER Pierre-Olivier Mercier <nemunaire@nemunai.re>
 
 EXPOSE 8081

pkg/minichecker/Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:alpine as gobuild
+FROM golang:1.17-alpine3.15 as gobuild
 
 ENV GOOS linux
 ENV GOARCH amd64
@@ -10,10 +10,10 @@ WORKDIR /go/src/minichecker
 ADD cmd ./
 
 RUN GO111MODULE=off go get -d -v
-RUN GO111MODULE=off go build -v -tags netgo
+RUN GO111MODULE=off go build -v -ldflags="-s -w" -tags netgo -o minichecker
 
 
-FROM alpine
+FROM alpine:3.15
 MAINTAINER Pierre-Olivier Mercier <nemunaire@nemunai.re>
 
 COPY --from=gobuild /go/src/minichecker/minichecker /bin/minichecker

pkg/monit/Dockerfile

@@ -1,4 +1,4 @@
-FROM alpine AS mirror
+FROM alpine:3.15 AS mirror
 
 RUN mkdir -p /out/etc/apk/ && \
     cp /etc/apk/repositories /out/etc/apk/ && \

pkg/nsd/Dockerfile

@@ -1,4 +1,4 @@
-FROM alpine
+FROM alpine:3.15
 MAINTAINER Pierre-Olivier Mercier <nemunaire@nemunai.re>
 
 RUN apk add --no-cache alpine-baselayout bash busybox nsd openssh openssl openrc python2

pkg/postfix/Dockerfile

@@ -1,4 +1,4 @@
-FROM alpine
+FROM alpine:3.15
 MAINTAINER Pierre-Olivier Mercier <nemunaire@nemunai.re>
 
 RUN apk add --no-cache bash postfix

pkg/tftpd/Dockerfile

@@ -1,4 +1,4 @@
-FROM alpine
+FROM alpine:3.15
 MAINTAINER Pierre-Olivier Mercier <nemunaire@nemunai.re>
 
 RUN apk add --no-cache tftp-hpa

pkg/wg-manager/Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:alpine as gobuild
+FROM golang:1.17-alpine3.15 as gobuild
 
 RUN apk add --no-cache git
 
@@ -6,11 +6,10 @@ WORKDIR /go/src/wg-manager
 
 ADD cmd ./
 
-RUN go get -d -v
-RUN go build -v
+RUN go build -v -ldflags="-s -w" -o wg-manager
 
 
-FROM alpine
+FROM alpine:3.15
 MAINTAINER Pierre-Olivier Mercier <nemunaire@nemunai.re>
 
 RUN apk add --no-cache --initdb \